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The canopy, the upper level of the trees in the rain forest, holds a plethora of climbing mammals of moderately large size, which may include monkeys, cats, civets, and porcupines. Smaller species, including such rodents as mice and small squirrels, are not as prevalent overall in high tropical canopies as they are in most habitats globally.
Small mammals, being warm blooded, suffer hardship in the exposed and turbulent environment of the uppermost trees. Because a small body has more surface area per unit of weight than a large one of similar shape. It gains or loses heat more swiftly. Thus, in the trees, where shelter from heat and cold may be scarce and conditions may fluctuate, a small mammal may have trouble maintaining its body temperature.
Question:
According to paragraph 2, which of the following is true about the small mammal in the rain forest?
A. They have body shapes that are adapted to life in the canopy.
B. They prefer the temperature and climate of the canopy to that of other environments.
C. They have difficulty with the changing conditions in the canopy.
D. They use the trees of the canopy for shelter from heat and cold.
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