There’s not much context given here, but if I woke up and all the food had vanished from my house, I would go to the store and buy more. Assuming the question is actually asking what you do if you were on the streets and starving, I would go to a relative or friend’s house and see if they could help me. If that didn’t work, I would go to a shelter. And if that also didn’t work, I would probably go around to different restaurants and stores to see if they had any leftover/old food they could give me. They actually toss out a lot of food that’s still technically good.