Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Let me give you an example: Earth rotates on its axis once times in one day.
The answer to this example can be: How many times does Earth rotate on its axis in one day?
Here is why: The given output correctly poses a question based on the scientific fact given.

OK. solve this:
Water at the surface of the ocean absorbs more energy from the sun of the following is the main reason water at the surface of the ocean is warmer than water at the bottom of the ocean.
Answer:
Which of the following is the main reason water at the surface of the ocean is warmer than water at the bottom of the ocean?