Question

Who is the strongest a. sun and b. wind

Answer 1

A, because in the story the wind tries to blow his cloak off by blowing harder and harder, and it just made the guy in the cloak put his coat on tighter.
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The sun, however, does it calmly and makes it hotter so he takes his cloak off.

So, A, The Sun is the strongest.

Glad I could help, and good luck!
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Answer 2

A is the answer, because he is able to make the traveler take off his cloak.