Water excretion is regulated by the brain and kidneys both organs. Thus the correct answer is option (D) Brain and Kidney.
Water excretion is the procedure through which the body rids itself of all metabolic waste. Human excretion involves a number of procedures that pass through various bodily components and interior organs. For preserving the body's homeostasis, it is one of the primary functions. The brain and kidneys are in charge of controlling water excretion. When salt concentrations are excessively high, the hypothalamus causes the pituitary gland to release antidiuretic hormone (ADH). As a result, the kidneys are stimulated to retain water rather than expel it. In the case of decreasing salt concentrations, the situation reverses.
Then the water is excreted from the body through sweat, respiration, and urine.
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