The internal clock for humans is accurate to within a few minutes for most people. however, it tends to run on a 24-hour clock and therefore must be reset each day. the brain region that is responsible for resetting the internal clock is the group of answer choices hippocampus fornix hypothalamus reticular activating system

Answer is Hypothalamus

Explanation:

the SCN or Suprachiasmatic Nucleus controls the biological clock also known as cyrcadian cycles, SCN is inside the hypothalamus. Also,  into the SCN there are a group of cells that respond to the presence or absence of light and stimulate  the production of sleep-related hormones like melatonin.

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