The right answer to this question is option D. Animals not adapted to cold migrate to warmer regions.
Explanation:
We can easily confirm this option by checking out birds, they're a very good example for that because they have a very good advantage through other organisms, they can fly, and by doing that, it's easy for them to go onto another biome. If a specific species of bird need hot weather to grab its food, there's no need for it at a cold spot, so this bird will probably search for a warmer place where there's enough food for it to survive.
An asteroid hitting the earth would cause a lot of dust, ash, and other debris to go into the atmosphere which would block the sun which would cause the temperature to decrease.
