What enables natural selection to occur?
Options:
- (A) environment
- (B) mutations
- (C) competition
- (D) relocation
- (E) Darwin
- (F) evolutionary development
- (G) root growth
- (H) research Let's solve this problem gradually.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Mutations are essential for evolution to occur. Natural selection is the mechanism of evolution. Mutations allow for natural selection to occur. So the final answer is (B).