Crack on cement floor and wall in the basement is not something to be proud of.
But keep in mind, the builder may try to choose ignoring if the crack is not as serious as stated in the document. (I believe it has to be bigger than 1 cm. But do not quote what I said, I can be wrong, check the Ontario home warranty program doc)
If the crack is not big enough to be acknowledged by the builder, and you still want them to be fixed, then you need to demonstrate your "public relation" communication skill. (negotiate with the builder).