Question

which statements describe the effects of indoor pollution? select two options.
ultrafine particles cause poor health.
nose hairs and mucus catch all the particles before they reach the lungs
ultrafine particles are absorbed by the lungs when people breathe.
ultrafine particles contribute to more than 20,000 deaths per year in the united states.
most ultrafine particles can be seen with the unaided eye.

Explanation:

• Ultrafine particles are very small and can enter the lungs when people breathe, causing poor health.
• Nose hairs and mucus do not catch all particles (so the statement about catching all is wrong).
• Ultrafine particles are too small to be seen with the unaided eye (so that statement is wrong).
• There is no general claim that ultrafine particles contribute to more than 20,000 deaths per year in the US in a general sense for this question's context (it's an over - specific and likely incorrect claim for the scope of this problem).

Answer:

Ultrafine particles cause poor health; Ultrafine particles are absorbed by the lungs when people breathe.