The answer is A.
An idiom.
Metaphor is one of the many figures of speech in which it uses implied comparison between two or more things that are not related but with specific similarities. Here are examples:
The rejection I received is another door for a great opportunity ahead.
She is the glasses of his eye frame.
<span>She has bouncy balls of emotions just by seeing him.</span>
The answer is going to be true
Hello there
Answer: B. optimum athletic performance is dependent upon a clean environment
Explanation: It is known that an optmun athletic perfomances requires certain conditions in order to be carried out. One of those condition is the cleanliness and the well-being of the environment, because it is part of the setting and the context of the enclosure in where the perfomance takes place. Being this perfomance dependent upon a clean environment, team sports will be contributing to overall environmental health.
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