The controlling idea for the the given question is that youths should prioritize community service in preparation for their future.
The controlling idea refers to the main or central idea which the writer is trying to build in the story or composition.
The controlling idea expresses a definite view or opinion about a particular topic. It completely expresses the topic without being vague. It gives only necessary details.
Therefore, the correct answer is option is (4) youths should prioritize community service in preparation for their future.
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