It has gotten dark,and soon the whole family is feeling tired.This shared experience occurs because everyone has:

Question

Quizplus · Accepted Answer

Melatonin production is regulated by the body's internal clock, which is responsible for the sleep-wake cycle. As the day progresses and it gets darker outside, the body naturally starts to produce more melatonin, which makes us feel sleepy. This is why the whole family is feeling tired as it has gotten dark.

It Has Gotten Dark,and Soon the Whole Family Is Feeling