Answer:
Junk Food Can Increase The Risk Of Diabetes. Banning Junk Food In Schools Could Decrease The Frequency Of Heart Disease. Junk Food Can Have Negative Affects On Bone Health. Habits Are Often Formed During Childhood And It's Important To Ensure That Kids Eat A Healthy Diet In School.
State why the main idea is important. This clarifies everything and allows the reader to get an initial opinion before reading on. A reader's interest won't be captured if they do not even know the main idea or why it is important!
It reveals the people in his life, were not "good people" and so he didn't want to grow up to be like them. They were struggling and He didn't want to struggle like them.