Right. #1 explains Why this Major. That’s not a CA prompt or similar. #3 would need to show more than learning grouting- which is not an admit tip.
Until OP has a better understanding of what T20 colleges look for, how will she know the topics and writing that shows them that? Right now, this teacher seems to be focuding on “interesting,” and not “relevant.”
After OP better understands what sorts of attributes tippy tops look for, she might be able to reframe #3.