How does radiation therapy differ from chemotherapy?

Radiation therapy indeed differs from chemotherapy primarily in how it targets cancer cells within the body. Radiation therapy utilizes high-energy rays or particles to pinpoint and destroy tumor cells in a specific area, essentially focusing its effects on that localized site, which allows for the potential preservation of surrounding healthy tissue. This targeted approach is particularly effective for localized tumors.

On the other hand, chemotherapy operates on a systemic level, meaning it is designed to treat the entire body rather than specific locations. It uses cytotoxic drugs that circulate through the bloodstream to reach and kill cancer cells throughout the body, which is particularly beneficial in cases where cancer has metastasized or spread.

Understanding this distinction is crucial for tailoring cancer treatment strategies based on the type, location, and stage of the cancer, as well as the overall health of the patient. The other options do not represent accurate descriptions of the differences between these two treatment modalities.