Yes, you can create a <span> element within <h1> or <h2> tags. The <span> element is an inline element that is typically used to apply styles or markup to specific parts of a text. Here's an example of how you can use a <span> within an <h1> tag:

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<h1>This is a heading with a <span>span element</span></h1>

And here's an example with an <h2> tag:

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<h2>This is a subheading with a <span>span element</span></h2>

By using the <span> element, you can apply CSS styles or add other elements like links or icons to specific parts of your heading text.

Bootstrap is a popular front-end framework used in web development. Its purpose is to provide developers with a set of pre-designed and reusable components, such as buttons, forms, grids, and navigation bars, that can be easily used to build responsive and visually appealing websites. Bootstrap also includes CSS styles and JavaScript plugins, making it easier to create a consistent and professional-looking user interface. By using Bootstrap, developers can save time and effort by leveraging ready-made components and styles, allowing them to focus more on the functionality of their website.

You can learn more about Bootstrap and its features here: https://getbootstrap.com/

In HTML, the <div> and <span> elements are used to group and style content, but they have some differences.

The <div> element is a block-level element, which means it creates a block-level box on the page. It is commonly used to divide sections of a webpage and create a layout structure. You can apply CSS styles to a <div> element, such as setting its width, height, background color, and margins. It is typically used for larger sections or containers.

Example:

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<div>
  This is a div element.
</div>

The <span> element, on the other hand, is an inline-level element. It is used to apply styles or target specific parts of text within a block-level element, such as applying specific CSS properties, like color or font-size, to a specific section of text. Unlike the <div> element, the <span> element does not create a new line or new block-level box around the content it wraps.

Example:

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<p>
  This is a <span style="color: blue;">span</span> element.
</p>

So, in summary, <div> elements are used for dividing sections or creating layout structures, while <span> elements are used for adding styles or targeting specific parts of text within block-level elements.

The <div> tag in HTML is used to create a division or a container for other elements. It does not have a specific meaning on its own, but it is commonly used to group related elements together and apply CSS styles to them collectively. It helps in organizing and structuring the content on a webpage. Here is an example of how the <div> tag can be used:

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<div>
  <h1>Welcome!</h1>
  <p>This is a paragraph inside a div.</p>
  <img src="image.jpg" alt="An image">
</div>

In this example, the <div> tag acts as a container for the heading, paragraph, and image elements.

It's hard to say without more information, but it's possible that the background picture is being tiled or repeated. This means that the image is being duplicated to fit the size of the element it's applied to, which could be causing the doubling effect.

You can check if this is the case by inspecting the element's CSS styles. Look for a background-repeat property and check that it's set to "no-repeat" to prevent the tiling effect. If it's set to "repeat" or "repeat-x/repeat-y", change it to "no-repeat" to see if that solves the problem.

Here's an example of how to set the background-repeat property to "no-repeat" in CSS:

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element {
  background-image: url('path/to/image.jpg');
  background-repeat: no-repeat;
}

If this does not solve the problem, it may be helpful to seek additional help or provide more details about the issue.

Using CSS media queries, you can create a website or web page with responsive design. Media queries allow you to target certain CSS styles based on the characteristics of the user's device, such as width, height, orientation, resolution, etc.

For example, using a media query to create a responsive website would look something like this:

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@media only screen and (max-width: 600px) {
  /* CSS code to make website responsive */
  body {
   font-size: 14px;
  }
}

By declaring a max width of 600px, this media query will apply the styles specified inside the query only when the screen size is less than 600px.

The syntax for a media query consists of the @media keyword followed by the condition that needs to be matched for the styles to be applied.

Link for more information about media queries and responsive design: https://developer.mozilla.org/en-US/docs/Learn/CSS/CSS_layout/Responsive_Design