You are presented with the question "Sperm swim to an egg inside a what?" and the following answer choices: 
- gastropod shells
 - aqueous solution
 - archetype
 - archive
 - ocean water
 - pollen
 - archegonium
 - sperm

Now knowing that fertilization occurs when sperm swim to an egg inside an archegonium and pregnancy begins with a fertilized egg, choose the best answer.


 

       archegonium  