Answer:
What is not a ball but yet a sphere, and holds all lands and people year after year?
What’s full of holes but still holds water?
This is meat from the upper part of a pig's leg salted and dried or smoked, often enjoyed in a sandwich.
If you suffer from this, you might wear a wig
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
I am a room that has a roof but no walls. What am I?