What is generally similar across species?
Options:
- (A) tail fins
- (B) our star
- (C) the eyes
- (D) vision
- (E) mating
- (F) Flowers
- (G) bushes
- (H) alpacas Let's solve this problem gradually.

user
Mating is generally preceded by courtship. Courtship is similar across species. Mating is generally similar across species. So the final answer is (E).
assistant