Answer :

Final answer:

The lowest body temperature is usually in the early morning, around 4 a.m.

Explanation:

In humans, body temperature is regulated by the hypothalamus, which acts as the body's thermostat. The normal body temperature is around 98.6°F (37°C), but it can vary slightly throughout the day. Body temperature tends to be lowest in the early morning, usually around 4 a.m. This is known as the nadir or the lowest point of the circadian rhythm.

During sleep, the body's metabolic rate decreases, leading to a drop in body temperature. As the day progresses, body temperature gradually rises, reaching its peak in the late afternoon or early evening.

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