What is the purpose of chemotherapy in cancer treatment?

The purpose of chemotherapy in cancer treatment is primarily to kill or slow the growth of cancer cells. This approach works by targeting rapidly dividing cells, which is a hallmark of cancer. Chemotherapy drugs disrupt the cancer cell's ability to proliferate, effectively reducing tumor size, alleviating symptoms, and improving the overall prognosis for patients with malignancies. This treatment modality can be used as a primary therapy, adjuvant treatment following surgery, or in conjunction with other therapies such as radiation.

The other options, while relevant in a healthcare context, do not align with the primary purpose of chemotherapy. Enhancing radiation effects is a specific aspect of certain treatment plans but not the primary aim of chemotherapeutic agents themselves. Providing emotional support and improving patient mobility are crucial components of holistic cancer care but are not related to the direct action of chemotherapy. Thus, the significant role of chemotherapy in treating cancer lies in its ability to directly target and manage cancerous cells effectively.