Answer:
It should be Carbon Cycle!
Explanation:
The other answers aren't involved with carbon. Hope this helps.
Evolution and natural selection
Answer: Receptor
Explanation: A protein that detects a signal and initiate physical response are receptor proteins.
Answer:
Some environmental factors that will influence the growth of an elephant are those such as natural predators, food available to them, shelter, and the maintainment of their natural habitat.
Explanation:
