use the excerpt to answer the question.

Good sleep hygiene, the behaviors that promote good sleep, will help ensure that middle schoolers get enough sleep.

how does the author develop the key concept in this sentence?

The author develops the key concept of "good sleep hygiene" by explaining that it consists of the behaviors that promote good sleep. This indicates that the author is focusing on the specific actions or habits that individuals should adhere to in order to attain sufficient sleep. By providing this explanation, the author emphasizes the importance of practicing these behaviors to ensure that middle schoolers receive an adequate amount of sleep.