Which of the following is the most responsible forcing the water cycles? a. gravity b. elevation differences c. energy from the sun d. flow of water over the ground

The energy from the sun is the most responsible for the water cycles. Think about it: Without the energy from the sun, water would not be able to evaporate (which is the first process in the water cycle), so it wouldn't be able to transition to the next process.

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the answer is :