To organize the text and to make the text easier to read
We use subheadings to give readers a sense of what they are reading, not to make them think the work is legit, and not to introduce new information or point out important facts. We want readers to know what is coming, and what they are going to read so we don't waste their time
It might be dangerous because everyone breathes the same air. Peoples body’s can be weaker to others and could get sick if no fresh air is coming threw the class.
