You are presented with the question "What has a circulatory system with one or two hearts that pump blood?" and the following answer choices: 
- a fish
 - sharks
 - abalone
 - elephants
 - humans
 - crocodiles
 - giraffes
 - fur seals

Now knowing that mollusks have a circulatory system with one or two hearts that pump blood and an abalone is a shellfish or mollusk, choose the best answer.


 

   abalone      