What about it???? I have read the book
I'm not the greatest at grammar, but I think the very first one is incorrect. It should just be a comma, then the second just a comma as well, but the last one is correct. (I have no idea, I am sorry if you get it wrong.)
The answer is repair because repairs would be in a sentence like we made 15 repairs in one day.
You can be like I have a lot of homework to do and I need to study for a test tomorrow and so you wouldn’t have time or you are busy
I'd say that the theme of this story encourages us that anyone can be important. Not just lawmakers or rich people or even extroverts, but anyone, whether you're a shy artist or an outgoing sporty-type. Some variation on that is probably what you're looking for, I shouldn't do your work for you! :)