Starting at the top, if you cut a square pyramid in half using a single cut, what is the shape of the newly-exposed section?

a.) square
b.) rectangle
c.) triangle
d.) pentagon

"Square" is the one shape among the following choices given in the question that would be the shape of the newly-exposed section. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that has come to your desired help.