You are presented with the quiz "Aquatic animals in water use webbed feet due to what?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "webbed feet are used for moving faster through water by aquatic animals" and "aquatic animals moving through water are also subject to the principles of aerodynamics". 

So, what's the best answer to the question?


 

  principals of aerodynamics         