Fact 1: Fertilization occurs when sperm swim to an egg inside an archegonium.

Fact 2: Water is needed to transport flagellated sperm to archegonium.

Given the two facts above, answer the question "what requires water?" with the following options: 
- Power plants
 - peachleaf willow
 - animal transport
 - engines
 - Most plants
 - mouth of rivers
 - an organism's body
 - fertilization


 

        fertilization 