We can actually infer here that the main function of the sentence “Unfortunately, these clouds are not natural; they are the result of a personal habit that negatively impacts others” in the paragraph is that: It gives more information about the clouds hovering around the doorway.
Main function actually refers to the sole duty of a particular thing. It actually tells what something was originally intended to do in a passage or in a place.
We see here that that the given sentence in the passage actually tells us more about the clouds. It tells us that the clouds are not natural clouds.
Thus, the above is correct.
Learn more about clouds on https://brainly.com/question/508705
#SPJ1