The best way to motivate friends to improve their emotional, social, and physical health is to plan an activity and invite the friends to be active with you. The correct option is a.
What is motivating?
Motivating is providing someone a reason to do something, that he wants to. Motivating someone is a good thing, it supports our friends and family to do the thing they want to do.
Here, for supporting the physical health of your friend, you should to activities with him.
Thus, the correct option is a, to plan an activity, and invite your friends to be active with you.
Learn more about motivation, here:
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