Ok, kids. Here's your Logic lesson of the day:
Considering that king of sin failed to mention what exactly that "disaster" was, we must assume that s/he meant one in which killed all the humans on earth; since king of sin said "person" which infers a human. Now, considering that you yourself are a human, then my first question would be, why did it kill all the other humans and not myself? If i am a human and no other human escaped this "disaster", then by all logical explanations, i should be dead too. BUT, for argument's sake, we shall set up a few hypothetical examples with you as the only soul surviving human on earth:
1.) You are now the soul surviving human on earth. All buildings, food, technology, etc. have survived miraculously. There are no rules since there are no governments since governments are run by 2 or more people. So, being young and reckless, you run amok in your town. You have many many things at your disposal: cars, planes, tanks, etc. But since you have no one else in the world to help renew those resources that you use, you can only use them for a short amount of time; that is, considering you know how to operate whatever it is you want to do. So, gas runs out, now you can't ride in anything that uses gas. And technology, there's no one there to run the electric company for you. So unless you're an electrician, you wouldn't be able to use your electronic devices that use any power cords (i.e. Playstation 2, TV, etc.). However, whatever you can run on a battery you can use; until the batteries all run out. Ok, onto food. Unless you know how to hunt or are a farmer and can grow your own food, you will starve eventually. The food resources left over will eventually be used up and you will be forced to hunt/grow your own food. If you cannot, you die. So basically in this scenario, you don't get to have very much fun and then you die.
2.) You will soon discover that Darwin's "survival of the fittest" is very correct. Since you're the only human on earth, you're now the minority and not the natural super-power known to nature. Basically, you'll be the hunted. So, that means that you won't have animal control to help you remove yourself from the jaws of an angry predator that's trying to eat you. You die as well.
3.) You frolick among the flowers. Pet the fuzzy bunnies and eat all the cookies and ice cream you can. Suddenly you feel a pain in your mouth. You have a cavity. There's no dentist around to drill it out. After a few months, it turns into an abcessed tooth and gets infected. You die a few months later.
4.) Now, here, you're having a good time surviving not getting eaten by a bear. You're hunting and growing food and reinacting scenes from Planet of the Apes with you as Charlton Heston. You come across a plant you've never seen before. You're hungry. You eat it. Since you never read that book about plants in your freshman year of high school in biology class, you don't know that this plant is fatally poisonous. You die.
So you see, the list could go on. Since we are sheltered by one another and technology, we humans now would not survive long alone.
So, king of sin, you ask, what would i do if i were the only person left alive on the earth, and i, Jasmine, would tell you, that i would SURVIVE!
And then have a volleyball for a friend and go insane too.