The correct option is B Kidneys
∙ Kidneys are part of the excretory system.
∙ It helps in eliminating wastes produced inside the body.
∙ It also helps in maintaining the water balance and pH of the blood in the body.
∙ If the body is well hydrated, the amount of water reabsorbed by the tubules is less. The urine would be dilute in this case.
∙ If the body is dehydrated then a lot of water is reabsorbed by the tubes and the urine is more concentrated.