Fact 1: Sperm had to swim from male to female reproductive organs for fertilization.

Fact 2: Male gametes are called sperm.

Given the two facts above, answer the question "Why do male gametes swim from male to female reproductive organs?" with the following options: 
- temperature changes
 - to leave the egg
 - fertilization
 - competition
 - it needs them
 - to feed
 - permineralization
 - to heal themselves


 

   fertilization      