Question

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sleep in which heart rate, breathing, and brain activity are steady

o irregular or rapid - eye - movement sleep

o regular or nonrem sleep

o visual acuity

o waking activity

o alert inactivity

Explanation:

Non - REM (NREM) sleep is characterized by steady heart rate, breathing, and brain activity. In contrast, REM sleep has more variable physiological responses. Visual acuity, waking activity, and alert inactivity are not types of sleep related to this description.

Answer:

regular or non - REM sleep