Question

radon seeps out of the ground. where is it most likely to accumulate in homes? attics basements

Explanation:

Radon is a radioactive gas that is denser than air. Basements are typically lower - level areas in homes. Due to its density, radon gas tends to settle in lower - lying spaces. Basements are more likely to have cracks or openings in the foundation through which radon can enter from the ground. Attics are upper - level areas, and since radon is denser, it is less likely to accumulate there compared to basements.

Answer:

Basements