Answer:
What has to be broken before you can use it?
Timid or weak people are said to not have these.
A sphere has three, a circle has two, and a point has zero. What is it?
Every country has one, though we are not the same. Waving to our citizens, throughout the wind and rain. What is it?
What can be measured but has no length, width or height?
When is it bad luck to see a black cat?