Question

Marco is not like most teens. he goes to bed around 9:00 p.m. every night and wakes up at 7:00

a.m. many of his friends stay up late most nights and are half-asleep all morning. his friends' hormones are most likely causing:

Answer 1

Their hormones are causing them to go to bed later than Marco and wake up later than him. There is most likely the result of hormone imbalance.

Answer 2

Them to go to bed later than the time that Marco goes to bed also causing them to wake up later the next day.