(Q).
Q: Carbon monoxide, radon gas, dust and pet dander are sources of what kind of pollution? Choices: - noise pollution - light pollution - sound pollution - indoor air pollution A:
(A).
indoor air pollution

(Q).
Q: The chemical used by the ants to weed their garden turns out to be what kind? Choices: - sulfide acid - nitric acid - sealant acid - formic acid A:
(A).
formic acid

(Q).
Q: What kind of diseases can be difficult to treat because they live inside the host's cells, making it hard to destroy them without killing host cells? Choices: - superfluous diseases - nucleus diseases - cancerous diseases - viral diseases A:
(A).
viral diseases