A person's 24-hour cycle of sleeping,waking,and performing daily activities is his or her

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The term circadian rhythm refers to a person's 24-hour cycle of sleeping, waking, and performing daily activities. This internal body clock is regulated by various factors such as light, temperature, and hormones. It plays an important role in maintaining the body's physiological functions and overall health. Option A (daily cycle) is too broad and does not specifically refer to this phenomenon, whereas option B (seasonal rhythm) and option D (habitual behavior) are unrelated to circadian rhythms.

A Person's 24-Hour Cycle of Sleeping,waking,and Performing Daily Activities Is