What is the function of the subheadings in ""All About Sleep""? All About Sleep They answer the question ""Why Is Sleep Important?"" and are followed by text that provides further details. 1. They answer the question ""Why Is Sleep Important?"" and are followed by text that provides further details.

2. They answer the question ""What Makes You Sleep?"" and explain the different steps of the sleep cycle.

3. They provide definitions of technical terms related to the study of sleep.

4. They provide links to information about sleep-related topics and expand on details in the text.

1. They answer the question ""Why Is Sleep Important?"" and are followed by text that provides further details.

Explanation:

The article shows important information about sleep, what are the reasons why sleep is important in our life and how sleep is composed, what are its phases and its effects on the body and on the quality of life of the human being. All of this is divided into several subtopics that organize the article based on the information that each subtopic represents, but in general, we can say that the subtopics seek to answer the question "why is sleep important?" which in the end is the goal of the entire article.