The human body does not constantly lose water through a. respiration b. digestion c. perspiration d. urination

The right answer is B digestion.

Animal sweating is the evacuation of sweat in mammals. Plant transpiration is the elimination of water vapor in plants.

The perspiration is the whole of the respiratory exchanges (elimination of water vapor, absorption of oxygen) which are done through the pulmonary alveoli and by evaporation through the skin without visible sweating.

Urination, the action of urinating, refers to the elimination of urine by the emptying of the bladder (losing water).

the intruder here is digestion, which rather absorbs water, through the stomach and intestines.