"Basic Overlooked Worldbuilding Questions"

1. Where does the water come from and how is it distributed?
2. Who makes the food?
3. Who transports and distributes the food?
4. If your world has moder utilities, are they widespread or only for the rich? Do utilities have to be modified to work in your world?
5. What happens to trash?
6. What happens to sewage?
7. What building materials are available?
8. What do people do when they get sick?
9. What do people do in case of a natural disaster?
10. What do people do in case of a fire?
11. How are large objects moved?
12. How are items that take skilled labor to make created and distributed?