Answer: elevation, index, contour interval
Explanation:
Molecules that have the same chemical formula but have different molecular structures are: Isomers.
This varieation can be justified because since they had different variations they probably had different niches which led them to evolve differently,this will help because the two species will have no competition
I believe the answer to your question is c
We need to have sunlight because without it you wouldn’t be able to make anything else