One type of health monitor measures the amount of time you spend in rem sleep

One type of personal health monitor measures the amount of time you spend in REM sleep. Explanation; -Fitness tracker or monitors have the ability to monitor or track the shut-eye during sleep.Nov 16, 2016

Explanation:

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the answer is: give 30 chest compression

when we choke on foods, the pathway that we use to breath is blocked and prevented air from coming into our body. this could resulted in death within minutes after occurrence. because of this, after witnessing such choking accidents, we need to call 911 and immediately give the chest compression in order to open up a pathway for air to come in.