You are presented with the question "what requires water?" and the following answer choices: 
- Power plants
 - peachleaf willow
 - animal transport
 - engines
 - Most plants
 - mouth of rivers
 - an organism's body
 - fertilization

Now knowing that fertilization occurs when sperm swim to an egg inside an archegonium and water is needed to transport flagellated sperm to archegonium, choose the best answer.


 

        fertilization 