By which processes does water present in living bodies return to the environmental water cycle?

Correct answer: Respiration, excretion and transpiration

Correct answer: B. Organisms temporarily take up water, but it can return to the environment through several routes. Animals release water vapour during respiration and lose water in urine, faeces and other excretory products; water may also leave through sweating where applicable. Plants release a large amount of water vapour through stomata during transpiration, and some water returns through plant tissues, litter and decomposition. Photosynthesis in A uses water as a reactant rather than being the general return process. Eating food in C does not itself return water to the environment, and D is false because water continuously cycles between organisms and their surroundings. Memory cue: organisms borrow water; respiration, excretion and transpiration return it.