When writing a good conclusion, make sure you state your statement at the end and focus on what you have said throughout your composition.
They are being biased based on ability. Asking if someone is deaf because they may not have heard the comment is being discriminatory based on ability.
Line 2 and the last line is correct, u should underline those.
You can add a conjunction to link the two sentences together.
Answer: It depends on what the story is about, unless you're letting us choose what we want it to be about.
I'd be more than welcome to help you, I just wanted to know if you have an idea what your story will be about.