You are presented with the question "Why do male gametes swim from male to female reproductive organs?" and the following answer choices: 
- temperature changes
 - to leave the egg
 - fertilization
 - competition
 - it needs them
 - to feed
 - permineralization
 - to heal themselves

Now knowing that sperm had to swim from male to female reproductive organs for fertilization and male gametes are called sperm, choose the best answer.


 

   fertilization      