Given the task definition and input, reply with output. Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

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.
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?