Which of the following is a function of excretion?

The correct answer is removing waste from the body because excretion is the biological process through which organisms eliminate waste products generated from metabolic activities. This process is essential for maintaining homeostasis, as it helps to remove toxic substances and regulates the levels of various chemicals in the body, ensuring that they do not reach harmful concentrations.

Functions such as regulating body temperature, producing hormones, and digesting food are important physiological processes, but they do not directly relate to the role of excretion. For example, regulating body temperature involves mechanisms like sweating or shivering, which are separate from the elimination of waste products. Similarly, hormone production occurs in various glands and organs and is vital for controlling various functions in the body, but it is not part of waste removal. Digesting food pertains to the breaking down of nutrients for absorption, not the elimination of waste created during or after digestion. Hence, the primary function associated with excretion is indeed the removal of waste from the body.