Question

fatigue concentration alert melatonin distraction 1. lack of sleep can reduce your in class. 2. the hormone helps signal the body when its time to sleep. 3. a buzzing phone can be a major at bedtime. 4. caffeine can make you feel more for a short time. 5. teens who stay up late often feel the next day. 6. use any of the words in an original sentence below.

Explanation:

1. Lack of sleep affects the ability to focus, so "concentration" fits.
2. Melatonin is the hormone related to sleep - wake cycle.
3. A buzzing phone draws attention away (is a distraction) at bedtime.
4. Caffeine is a stimulant that makes one more alert.
5. Staying up late leads to tiredness (fatigue).
6. An example sentence for "alert": The guard dog remained alert throughout the night.

Answer:

1. concentration
2. melatonin
3. distraction
4. alert
5. fatigue
6. The guard dog remained alert throughout the night.