Detailed Instructions: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
See one example below:
Problem: Earth rotates on its axis once times in one day.
Solution: How many times does Earth rotate on its axis in one day?
Explanation: The given output correctly poses a question based on the scientific fact given.

Problem: The tilt of earth on its axis causes summer to be warmer than winter in the northern hemisphere because the rays of the sun strike the northern hemisphere more directly in the summer.
Solution:
Which of the following statements best explains why the tilt of Earth on its axis causes summer to be warmer than winter in the Northern Hemisphere?