The reason "curative medicine" is related to "medical intervention during illness" (option 3) is as follows:

 1. Curative medicine is a branch of medicine that focuses on treating and alleviating diseases and health conditions after an individual becom.es ill. It involves medical interventions, such as diagnosis, prescription of medications, surgeries, and other medical procedures, to help patients recover from illness and regain their health.

 2. This is in contrast to preventive medicine, which aims to prevent illness or disease from occurring in the first place through measures like vaccination, health education, and good sanitation facilities (options 1, 2, and 4, respectively).