I'm not sure about other vehicles, but I can tell you how a car moves. In the engine, there are four steps that need to occur. They are intake, compression, combustion, and exhaust. Fuel and air is put into the chamber, the piston compresses the mixture causing it to combust, and then releases it as exhaust. The power from the combustion stage is what causes the engine to move the vehicle. Hope this helps :)
an engine
Crankshaft transfers a reciprocating motion into a rotary motion into transmission which makes vehicle move.
what makes the lunar rover go is that you go into the vehicle bay and move the big thing at the top to the right.[using the little thing with the sun on it on the right.] then move the "light catchers" from one to another.[there are 3 of them] at the last light catcher move the light from the catcher on to the rover. that's what makes it go.
When the tow truck makes contact with another vehicle it is in possession of that tow/repo company. If they connect to another vehicle to "move" it they are in possession of that vehicle without cause or permission. This is technically a stolen auto at that time. It is NOT legal to move other vehicles to get to another. A good repossession agent with proper use of his tools can get a vehicle out of even the most tightly squeezed places. Before you accuse a repo agent of "stealing" a vehicle, make sure he actually did!!!
the wind makes it move
The wind makes a kite move
wind makes the clouds move
Air pressure or water pressure makes water move.
The drive train of an automobile would consist of whatever makes the vehicle move such as engine, transmission, driveshaft, differential(s), axles and so on.
Because your spouse's vehicle is blocking you in?? This question makes about as much sence as asking, "Why is there air?"
Bad tire? Move to another location on vehicle to see if that makes a difference Bent wheel? Bad CV joint? Bent axle?
Out of the area