Answer:
The fall made animals and plants affected by disease. It was hard to get food,many things died and it also made some animals into carnivores.
Yes from multiple sources of runoff. Im pretty sure.
I think it’s all of the above.
Changing the environment would mean that traits are going to me favored, but that also means that niches also open up as a result.
I hope that helps.
It would be D. being able to eat plants that survive in the changed environment
Hope this helps :))
