Animals should be protected because science increasingly demonstrates
that animals are more sensitive, aware, and intelligent than has long
been believed in places like the US. The knowledge that animals are very
likely aware of the conditions in which they’re kept in places like
factory farms, or the abuses they suffer during laboratory experiments,
means that a change in practices is long overdue. Animals also play a
critical role in the ecosystems and biospheres that make life on Earth
possible for humans. Protecting animals—as well as the oceans, forests,
and grasslands they inhabit—will help safeguard the future for all
species, including homo sapiens.
Read more about animal protection here