Fact 1: Mating is generally preceded by courtship.

Fact 2: Courtship is similar across species.

Given the two facts above, answer the question "What is generally similar across species?" with the following options: 
- tail fins
 - our star
 - the eyes
 - vision
 - mating
 - Flowers
 - bushes
 - alpacas


 

     mating    