You are presented with the question "the egg implants itself in the uterus after sperm does what?" and the following answer choices: 
- permineralization
 - release more eggs
 - rapid expansion
 - migrate
 - swim to the sea
 - reproduce
 - swim to an egg
 - drown in the uterus

Now knowing that fertilization occurs when sperm swim to an egg inside an archegonium and if fertilized, the egg implants itself in the uterus, choose the best answer.


 

       swim to an egg  