C read the essay aloud to yourself
This looks more like a opinionated question but I believe you can narrow it down to options 3 and 4, out of those 2 I think option 3 is the best choice
The answer is A. relative.
The sentence use the pronoun "that" which can be either a relative or a demonstrative. By analysing the sentence, we can see the pronoun was used to connect (relative) instead of to point at things (demonstrative).
For question one I'd say youthful energy and life...hope this helps, and good luck!
