Which biological functions are included in the water cycle?

The correct choice highlights two important biological functions, respiration and transpiration, that are integral to the water cycle.

Respiration occurs when living organisms consume oxygen and release carbon dioxide, a process that also involves water vapor. This transfer of water is vital as it contributes to the moisture in the atmosphere, which can later lead to precipitation.

Transpiration refers to the process by which water is absorbed by plant roots, moves through the plant, and is released as vapor through small openings in the leaves known as stomata. This process not only helps in maintaining plant health but also plays a key role in the water cycle by returning moisture to the atmosphere, which can then condense and fall back to the ground as precipitation.

The understanding of these biological functions is crucial in recognizing how they contribute to the larger water cycle, connecting living organisms with the movement of water in the environment.