You are presented with the question "What do mollusks hearts circulate through the body?" and the following answer choices: 
- liquid
 - Energy
 - complex
 - food
 - water
 - blood
 - grass
 - oxygen

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.


 

      blood   