Why do textbooks divide information into units, chapters, lessons, and sections

What happened when the boy who survived an explosion aboard a steamboat returns to town

Could someone me with this question?

Select all the correct answers. which sentences contain a noun clause? rhett was unwilling to listen to what his friend told him. jade won the frisbee competition that was held in the city park. whoever said that the early bird catches the worm was right. the cowboy threw his lasso at the bull, which quickly threw it off and raced away.