Which of the following is NOT a function of immunotherapy?

Immunotherapy plays a critical role in cancer treatment by harnessing and enhancing the body's immune system to recognize and combat cancer cells. The correct choice indicates that using chemicals to destroy tumors is not a function associated with immunotherapy. Instead, this approach aligns more closely with traditional cancer treatments such as chemotherapy, which involves the use of chemical agents designed to kill or inhibit the growth of cancer cells.

Immunotherapy functions by boosting the body's natural defenses, providing additional components to help mount an immune response, and specifically engaging the immune system against cancer. These mechanisms focus on empowering and directing the immune response rather than relying on direct chemical destruction of tumors. This distinction highlights the unique nature of immunotherapy compared to other conventional treatment modalities.