Final answer:
Hyperthermia is an increase in body temperature caused by a decrease in bodily fluids.
Step-by-step explanation:
Hyperthermia is an increase in body temperature due to a reduction in bodily fluids. This typically occurs when the body is unable to regulate its temperature properly, such as in cases of dehydration or heat exhaustion. When the body lacks sufficient fluids, it becomes more difficult to cool down through mechanisms like sweating, leading to a rise in body temperature.
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