Fact 1: Ejaculation occurs when muscle contractions propel sperm from the epididymes.

Fact 2: Male gametes are called sperm.

Given the two facts above, answer the question "What occurs when muscles contract and propel male gametes?" with the following options: 
- fertilization
 - sex
 - ejaculation
 - electrically
 - rapid expansion
 - motion
 - competition
 - intercourse


 

   ejaculation      