You are presented with the quiz "Playing is one of many ways animal improve ability to what" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "playing is just one of many ways that mammals and other animals learn how to behave" and "learning and memory are essential to an animal's ability to survive and thrive". 

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


 

       survive    