If a person sleeps for 8 hours in one night, then about how many times do they cycle through the stages of sleep?

a. 10 times
b. 8 times
c. 5 ½ times
d. 6 ½ times

it’s lava came from an explosive eruption

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.