Answer
#10AA 		                                                                               Earth             
                                                                                                          What is the primary cause of Earth's seasons?
How it Works:
The primary cause of Earth's seasons is the tilt of its axis as it orbits the Sun. As Earth orbits the Sun, the tilt remains fixed in space. Because of this tilt, different parts of Earth receive the Sun's most direct rays at different times of the year. 		            
                                                                       
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