15. ?The danger of volcanic ash is increased when ____

a. ?it is composed of hydrogen sulfide compounds
b. ?the volcano creates rain, making building collapse more likely
c. ?dry conditions allow it to collapse quickly to form tuff
d. ?it contacts and melts snowbanks, resulting in flash floods
e. ?the flammable ash comes into contact with fire or high heat


ANSWER: b

Environmental & Atmospheric Sciences

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