You are presented with the question "What requires a type of fluid to survive?" and the following answer choices: 
- snail
 - wind
 - tapeworms
 - mussels
 - stones
 - animals
 - sand
 - Nematoda

Now knowing that animals require water for survival and water fills the oceans of the world up to sea-level making it a liquid, a type of fluid, choose the best answer.


 

      animals   