Answer:
What has a neck but no head?
As a state in the USA, I am round on both sides and high in the middle. What am I?
I cause involuntary movements in your vehicle
I have wheels and flies yet I am not an aircraft.
I cannot be burned in fire or drowned in water. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.