Think of your own experiences, even things as simple as going to the zoo and finding out you really like monkeys. Describe what you were feeling during that moment and what caused you to understand that. Describe your surroundings too
I would say that the sentence which uses a vocabulary word wrong is C) The melancholy scene brought a chill cadence to the back of my neck.
Cadence is a rhythm, or a sequence of notes.
They are afraid to lose what they have.