Emilia wears her Fitbit to bed each night. What MOST likely results from this action?

Question 4 options:

It does a full scan of her body looking for irregular moles.

It vibrates when she snores too loudly.

It beeps every hour to remind her to roll on her side.

It tracks her light, deep, and REM sleep cycles.

It tracks her light, deep, and REM sleep cycles.