Q: What learns to behave through playing?
Options:
- (A) otters
- (B) bacteria
- (C) viruses
- (D) rocks
- (E) lions
- (F) animals
- (G) humans
- (H) Birds
A: (E)
Explain how we arrive at this answer: 
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Explanation: Playing is just one of many ways that mammals and other animals learn how to behave. Mammals include lions, bears, dogs, horses, cattle and antelopes. Playing is one way that lions learn how to behave.
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