What can be inferred from the passage about how camels survive in the desert?
Read the passage: Camels are famous for surviving in deserts, but their humps do not hold water, as many people believe. Instead, a hump stores fat, which the animal can break down for energy when food is scarce. The camel's real secret lies in how carefully it uses water. Its body temperature is allowed to rise by several degrees during the hot day, so it begins sweating only when it becomes very warm. Its kidneys produce concentrated urine, and its droppings are so dry that they can be used as fuel almost immediately. When a thirsty camel finally reaches water, it can drink a very large amount in just a few minutes, quickly restoring what it has lost.
Correct answer B. Letting its body heat up during the day helps a camel lose less water through sweating.
Since the camel starts sweating only when it becomes very warm, allowing its temperature to rise means it sweats less and so saves water.
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