You are presented with the question "what kind of heart do mollusks have?" and the following answer choices: 
- organ
 - epidermal
 - fossils
 - ligt
 - three
 - warmth
 - warm
 - simple

Now knowing that mollusks have a circulatory system with one or two hearts that pump blood and mollusks have a simple heart, which pumps the blood throughout the body, choose the best answer.


 

        simple 