The sleep stage at which muscles begin to contract and relax is
a. stage 1
b. stage 2
c. stage 3
d. stage 4

The sleep progresses through a series of four stages. In each stage different brain wave patterns are displayed. The sleep stage at which muscles begin to contract and relax is Stage 2. Correct B

This stage lasts for approximately 20 minutes and it is characterized with decreased body temperature starts and slower heart rate. Stage 2 prepares the body to go into a deep sleep.

the answer is (c

explanation:

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