Question

what does sunscreen protect human skin from?
ionizing radiation
radio waves
infrared rays
non - ionizing radiation

Explanation:

Sunscreen protects skin from ultraviolet (UV) rays which are a form of non - ionizing radiation. Ionizing radiation is a different type not blocked by sunscreen. Radio waves and infrared rays are not what sunscreen is designed to protect against.

Answer:

D. non - ionizing radiation