Gerund phrases are used as nouns
Well an exposition is a <span> comprehensive description and it explains an idea or theory.
So I'm going to go with D. </span>
Sentences? How about this:
Hitting the tree put a dent in my car.
I found a stash of candy hidden under my brother's pillowcase.
Or if you need them both in one sentence:
I tried to get to the stash of food behind the metal door, but I could barely make a dent.
Is that what you needed?
The poem the Cremation of Sam Mcgee would not be a poem if it did not rhyme.
Poetry requires rhyme. It is the art of rhyming that makes any piece of poetry valuable. Beyond this, without rhyme the listeners would be less interested in the story as one of the main assests of this creation is its use of rhyming structure to keep us hooked on the tale.