A: I chose the jaw.
Q: Why did you choose that joint?
A: I think it's the most important joint because it's what you use to talk, drink and eat. Without our jaw we would starve/dehydrate and we couldn't communicate.
Q: What things would be difficult to do without that joint?
A: Something you couldn't do if you didn't have your jaw would be: to talk or open your mouth. Also you couldn't eat or drink.
Q: What movement can be done without the use of joints? (Example: blinking your eyes)
A: An example is breathing because you can keep your mouth closed when you breathe. You could also listen to things.