Eating salty pretzels affect the excretory system because it will release less water to maintain the balance of water and salt. Option C is correct.
The excretory system is responsible for the removal of the wastes, excess, unnecessary materials from the body fluids produced by homeostasis. There are plenty of parts of the body that participate in this process including sweat glands, the liver, the lungs and the kidney system. The purpose of the excretory system is to help maintain internal chemical homeostasis and prevent damage to the body.
