Question

Why do some animals die off while other similar animals survive in the same environment?

Answer 1

animals have evolved to live in different environments and some aren’t meant for it, the animals that aren’t evolved for that climate will die while those who are or do evolve will survive

Answer 2

Extinction is often caused by a change in environmental conditions. When conditions change, some species possess adaptations that allow them to survive and reproduce, while others do not. If the environment changes slowly enough, species will sometimes evolve the necessary adaptations, over many generations.