Question

why do garages usually have low air quality? they are outside. chemicals are stored in garages.

Explanation:

Garages often store chemicals like paints, solvents, or fuels. These chemicals can release volatile compounds that degrade air quality. The option "They are outside" is incorrect as being outside doesn't inherently cause low air quality; in fact, outdoor air is usually more ventilated. Stored chemicals in garages (e.g., from car fuels, cleaning agents) emit pollutants, leading to poor air quality.

Answer:

B. Chemicals are stored in garages.