What is generally similar across species?\nOptions:\n- (A) tail fins\n- (B) our star\n- (C) the eyes\n- (D) vision\n- (E) mating\n- (F) Flowers\n- (G) bushes\n- (H) alpacas
Step-by-step reasoning process below:
(E)
Mating is generally preceded by courtship.

Courtship is similar across species.

Mating is generally similar across species.

.

Therefore, the answer is (E)