Yes. Virtually anything can be the theme of an essay, as long as you can find enough information about it to write enough paragraphs to be considered an essay.
Complications is the correct answer.
1. The word that should be followed by a comma is D. Dan.
2. The word that should be followed by a comma is D. yesterday.
3. The word that should be followed by a comma is A. Moreover.
4. The word that should be followed by a comma is B. truth.
5. The word that should be followed by a comma is D. hand.
6.The word that should be followed by a comma is B. Zoe.