The term "lower animals" is outdated and considered offensive in modern biology and animal ethics. It's no longer used by scientists or anyone who respects the diversity and complexity of life on Earth.

Here's why:

* Implies a hierarchy: The term suggests a linear progression of life, with humans at the top and other animals "lower" down. This is a false and anthropocentric view.

* Based on outdated assumptions: The idea of "lower" animals is based on old and inaccurate classifications that focused on physical characteristics like brain size or complexity. This ignores the incredible diversity and adaptations of all species.

* Devalues other life: Calling animals "lower" implies that they are less valuable or important than humans, which is unethical and disrespectful.

Instead of "lower animals," it's best to use terms like:

* Non-human animals: This is a neutral and accurate way to refer to animals other than humans.

* Animal species: This emphasizes the diversity and unique adaptations of different animal groups.

Remember, all life is interconnected and deserves respect.