You are presented with the question "an aquatic animal requires not having too much what in water?" and the following answer choices: 
- warmth
 - Energy.
 - energy
 - fats
 - algae
 - matter
 - harm
 - sodium

Now knowing that an aquatic animal requires great amounts of water to survive and too much algae can deplete the water of oxygen, making it impossible for aquatic animals to survive, choose the best answer.


 

     algae    