Look at the snake in the tall grass!
an explanatory sentence is explaining what you said in your topic sentence
The room was abuzz with excitement as the Bride appeared at the top of the stairs.
She tried to conceal her excitement about the surprise party, but her smile gave her away.
Answering your question gave me a feeling of excitement.
I hope my answer causes a lot of excitement!
it is a noun. The excitement made me happy.
Oh, dude, the nouns in that sentence are "excitement" and "air." Excitement is like, the feeling of being all pumped up, and air is like, you know, the stuff we breathe. So, yeah, those are the two nouns in that super thrilling sentence.
My excitement will diminish.
All of these options would adequately clarify the meaning of the modifier.
You could see the excitement of the four year olds as they played in the water.
Exclamatory
The little boy couldn’t contain his excitement as he watched the piñata smash open, spilling candy everywhere.