Let's look at a sample answer using the "idea, explain, example" structure. This time I'm using a personal example in the last sentence.
What disagreements do teenagers often have with their parents? Why?
(Idea / basic answer) Teenagers disagree with their parents about all sorts of things, like the clothes they want to wear, whether they can go out with their friends, doing homework, and how much help they give their parents around the house. (Explain why) I think the teenage years are when we develop a sense of identity, and we want to make our own decisions rather than follow other people's instructions. (Personal example) I remember having disagreements with my own parents, usually about simple things like getting up early in the morning, tidying my room, or doing the washing up!
Can you answer the following question in the same way?
Do you think that it's important to be polite?