63, C
64 a
65 C
My guess GOODLuck buddy
Answer - C. Reproduction
Reasoning - This was answered before within the community. Here's a reasoning why I chose the answer. - Just like a hydra they are abundant since they can reproduce asexually without having to reproduce with a mate, which means they the ecosystem can eat they and keep the active food chains going.
Answer:
The Answer is A.
Explanation:
This is correct because evolution is a change in the inherited traits of a population over many generations. While natural selection is a mechanism where the members of a population best suited to their environment have the best chance of surviving to pass on their genes.
