Answer the following question given this paragraph: 

Insects can be found in every environment on Earth. While a select few insects, such as the Arctic Wooly Bear Moth, live in the harsh Arctic climate, the majority of insects are found in the warm and moist tropics. Insects have adapted to a broad range of habitats, successfully finding their own niche, because they will eat almost any substance that has nutritional value.


Q: What animal group can be found in every environment on earth, but primarily in the warm and moist tropics?

 Choices:

- rodent

- horses

- reptiles

- insect

A:
insect
