You are presented with the quiz "What are global wind patterns caused by?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "unequal heating of Earth 's surface by the Sun causes global wind patterns" and "unequal absorption of radiation causes unequal heating of the earth's surface". 

So, what's the best answer to the question?


 

        Unequal radiation absorption   