To which demographic group does the risk of radon exposure primarily apply?

The risk of radon exposure applies to all individuals, regardless of smoking status, making this the correct choice. Radon is a naturally occurring radioactive gas that can accumulate in homes and buildings, regardless of the occupants' age or whether they smoke. It is recognized as a significant health risk, contributing to lung cancer cases among various demographics. Children and older adults may be particularly vulnerable due to their developing and aging bodies, respectively, but the risk is not limited to these groups or confined to non-smokers.

Individuals who smoke may have a compounded risk when exposed to radon, but the danger is present for everyone in indoor environments where radon levels are elevated. This makes it essential for all homeowners and occupants to be aware of radon risks and consider testing for it, irrespective of their smoking status or age.