Final answer:
The hypothalamus is the forebrain structure that regulates eating, drinking, body temperature, and sexual behavior. It controls the endocrine system, circadian rhythms, and is involved in memory and emotion as part of the limbic system.
Step-by-step explanation:
The structure within the forebrain that plays an important role in regulating eating, drinking, body temperature, and sexual behavior is the hypothalamus. The hypothalamus controls the endocrine system by releasing hormones that affect other glands and cells, and it regulates behaviors related to food and water intake, energy expenditure, and body temperature. It also regulates circadian rhythms and is involved in memory and emotion as part of the limbic system.
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