Question

how can radon gas commonly enter a home, posing a risk to the occupants? brought in by indoor plants emitted from new furniture seeping through cracks in the foundation leaking from air conditioning units

Explanation:

Radon is a radioactive gas that occurs naturally in soil and rock. It can seep through cracks in a home's foundation, as well as through other openings like pores in concrete blocks, gaps around pipes, and drains. Indoor plants do not bring in radon, new furniture typically emits volatile organic compounds (VOCs) rather than radon, and air - conditioning units do not leak radon.

Answer:

seeping through cracks in the foundation