Which renewable energy resource relies on the movement of water?

Tidal energy relies on the movement of water, specifically the movement of ocean tides. This renewable energy resource harnesses the gravitational forces between the Earth, the Moon, and the Sun, which cause the rise and fall of sea levels. As water moves in and out with the tides, it can be captured and converted into electricity using various technologies, such as tidal stream generators or tidal barrages.

Other renewable energy sources, such as wind energy, utilize air movement, while solar energy captures sunlight and converts it into electricity. Biomass energy involves organic materials and does not directly rely on the movement of water. Therefore, tidal energy uniquely depends on water movement, making it the correct choice for this question.