The only effective check on grass and brush fires is rain. If the level of rainfall is below normal for an extended period of time, then there are many more such fires. Yet grass and brush fires cause less financial damage overall during long periods of severe drought than during periods of relatively normal rainfall.
Which one of the following, if true, would most help to resolve the apparent paradox described above?The paradox is that drought causes more grass and brush fires, but those fires cause less total financial damage than fires during normal rainfall periods.
The best explanation is that severe drought leaves less vegetation available to burn, so even though there are more fires, the fires may be
smaller or less damaging overall.
(A) Fire departments tend to receive less funding during periods of severe drought than during periods of normal rainfall.
This makes the paradox worse. Less funding should make fires harder to control, so we might expect more damage, not less.
(B) Areas subject to grass and brush fires tend to be less densely populated than areas where there are few such fires.
This does not explain the difference between drought periods and normal rainfall periods. It compares different types of areas, not the same fire risk under different rainfall conditions.
(C) Unusually large, hard-to-control grass and brush fires typically occur only when there is a large amount of vegetation for them to consume.
This is correct. During normal rainfall periods, there is more vegetation, so fires can become larger and more destructive. During severe drought, there may be less vegetation available, so even more frequent fires may cause less total financial damage.
(D) Grass and brush fires that are not caused by human negligence or arson tend to be started by lightning.
This does not resolve the paradox. It concerns how fires start, not why fires during drought cause less financial damage overall.
(E) When vegetation is destroyed in a grass or brush fire, it tends to be replaced naturally by vegetation that is equally if not more flammable.
This does not explain why damage is lower during severe drought. It discusses later replacement vegetation, not the immediate damage pattern.
Answer: (C)