The hydrologic cycle is driven by ________.
gravity water and solar energy solar energy water gravity and solar energy
The hydrologic cycle is driven by solar energy. Solar energy causes evaporation of water from surfaces like oceans, rivers, and lakes, which is a key process in the cycle. Gravity also plays a role in the movement of water, such as in precipitation and runoff, but the primary driving force is solar energy. Therefore, the best answer is solar energy.