You are presented with the question "What swim from organs that produce hormones for fertilization?" and the following answer choices: 
- sperm
 - toads
 - embryos
 - blood
 - humans
 - eggs
 - seeds
 - ovaries

Now knowing that sperm had to swim from male to female reproductive organs for fertilization and endocrinology is the study of organs that produce hormones involved in fertility and reproduction, choose the best answer.


 

 sperm        