Final answer:
Water serves multiple purposes in the body, including carrying waste, transporting nutrients, assisting with nutrient absorption, and regulating temperature. Therefore, the correct option is b.
Step-by-step explanation:
Water serves multiple purposes in the body, including carrying waste out, transporting nutrients, assisting with nutrient absorption, and regulating temperature. It acts as a transportation vehicle for oxygen, hormones, and nutrients to body cells, while removing waste products and carbon dioxide. Water also helps remove excess water, salts, and nitrogen from the body through urine. Overall, water is essential for the proper functioning of the body and plays a crucial role in various bodily processes.