The correct answer is B.

When airways tighten and the lungs don't get enough air. Read more asthma facts (PDF)(36 pp, 1 MB, About PDF).

The correct answer is False.

Asthma is a serious, sometimes life-threatening chronic respiratory disease. Although there is no cure for asthma yet, it can be controlled through medical treatment and management of environmental triggers. Learn more about asthma and the indoor environment.

The correct answer is All of the above.

Asthma attacks can be triggered by tiny dust mites, molds, pet dander, secondhand smoke and even cockroaches. Learn more about other indoor irritants that can be asthma triggers.

The correct answer is All of the above.

Check out EPA’s new PSA featuring the Breathe Easies Exit, who educate parents and children with asthma about simple steps to prevent asthma attacks. Read more about pests, pesticides and public health.

The correct answer is True.

Secondhand smoke is a risk factor for new cases of asthma in preschool-aged children. Secondhand smoke can also trigger asthma episodes and increase the severity of attacks. Children's developing bodies make them more susceptible to the effects of secondhand smoke and, due to their small size, they breathe more rapidly than adults, thereby taking in more secondhand smoke. Take action and ensure children are not exposed to secondhand smoke.

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