Question

which air pollutant is most likely to cause bronchitis?
○ emissions
○ ozone
○ pollution
○ carbon monoxide

Explanation:

To determine the air pollutant most likely to cause bronchitis, we analyze each option:

• "Emissions" is a general term for the release of pollutants, not a specific pollutant.
• "Ozone" (ground - level ozone) is a respiratory irritant. Inhaling ozone can inflame the airways, including the bronchi, and is associated with the development of bronchitis, especially in those with pre - existing respiratory conditions or with prolonged exposure.
• "Pollution" is a broad term and not a specific pollutant that causes bronchitis.
• "Carbon monoxide" mainly binds to hemoglobin in the blood, reducing oxygen - carrying capacity, and its primary health effect is related to oxygen deprivation rather than directly causing bronchitis.

Answer:

B. ozone