Which type of radiation is considered harmful to health?

All types of radiation—alpha, beta, and gamma—are considered harmful to health, each posing unique risks. Alpha radiation consists of heavy particles that can cause significant damage to living tissue if ingested or inhaled, despite being relatively weak and unable to penetrate skin. Beta radiation, made up of lighter particles, can penetrate the skin and cause harmful effects to internal tissues, particularly with prolonged exposure. Gamma radiation has a high energy level and can penetrate deeply into the body, affecting organs and increasing cancer risk.

Understanding that all these radiation types can pose health dangers justifies the selection of the option that includes all of them. Each type of radiation has distinct mechanisms of interaction with biological tissues, leading to various health implications, including increased cancer risk and acute radiation syndrome depending on exposure levels. Thus, recognizing the hazards of all radiation types is vital in contexts such as healthcare, environmental safety, and occupational health.