Which Act do you need the metaphor from?
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Answer:
Children
Explanation:
A simple subject is the main subject in a sentence. Happy is describing the simple subject, pool could be a subject but not the main one. Play is the action the simple subject is doing.
This is called interpretation.
This is when critics want to find meaning in what an author has written. Analysis is much broader while scanning is incorrect. Evaluation is also inappropriately used here.