The process by which the body removes harmful metabolic waste products, such as excess salts, urea, and carbon dioxide, is called excretion.
Step 1: Reproduction.
Reproduction is the biological process by which organisms produce offspring. It is not concerned with the removal of harmful products from the body.
Step 2: Digestion.
Digestion is the process by which food is broken down into nutrients that the body can absorb. While it involves the processing of substances, it does not involve the removal of harmful waste products.
Step 3: Circulation.
Circulation is the movement of blood and other fluids throughout the body. It helps in the transportation of nutrients, gases, and waste products but is not responsible for removing harmful substances directly.
Step 4: Excretion.
Excretion is the process by which the body removes metabolic waste products, such as urea, carbon dioxide, and excess salts, from the blood. This process is carried out by organs such as the kidneys, lungs, and skin.
Step 5: Conclusion.
Thus, the process of removing harmful products from the body is called excretion. The correct answer is (B).