Answer: aging?
Explanation: sorry, i’m not too sure, but that would be my best guess.
obsessive compulsive disorder because OCD is a neurobiological disorder — not a condition that is caused by action or inaction.
I believe the answer to your question would be Fluorine. I hope I answered your question, my friend. :)
I would think the answer would be C. Based off of what I've learned and heard. Sorry if it's not the correct answer though.
