Answer:
The correct answer is to inform readers about the ways young people improve the world.
Step-by-step explanation:
By titling the book "It's Our World, Too!: Young People Who Are Making a Difference", the author clearly wants to point out the stories and accomplishments of young people who changed the world in one way or another. Maybe the author will mention writers, inventors and scientists that have managed to change an aspect of the world for the better at a very young age (and who are still young to this day).