An automobile is a type of vehicle.
A vehicle is a machine to move people and things.
A vehicle is not alive. A horse can move people and things but it is not a vehicle.
Some vehicles move on land. Most land vehicles have wheels. Examples are bicycles, cars, motorcycles, and trains.
Some vehicles move on or in the water. Examples are boats, ships, and submarines.
Vehicles that move in the sky are called aircraft. Examples are aeroplanes and balloons.
Vehicles can get propulsion power from various sources.