Why does lake say his son will respond "13" when he is asked how many months are in a year?

Can someone me answer this english question

Why is it important to be aware of you audience's interests? a. so that you can teach them new information thy didn't know b. so that you can use opposite ideas in order to shock them c. so that you can use the most effective strategy to persuade them d. so that you can pretend to like the same things and get them to trust you

What is the meaning of 'aesthetic'?