The drive shafts are connected to the differential and wheel hubs through universal joints because the universal joints

absorb the vibrations transferred from the surface of the road

compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.

absorb any difference in speed between the left and right wheels when the vehicle is turning

none of the above

air

automatic transmission fluid (ATF)

gears

steel belt

synchronizer

planetary gear

magnetic clutch

hydraulic multi plate clutch

eliminates gear clutches

eliminates the gear shift lever

reduces the number of automatic transmission components

reduces shift shock and achieves more efficient transmission of engine torque.

delivers improved cornering on dry road surfaces

eliminates the need of snow tyres, tyre chains etc.

ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces.

ensures that effective braking cab be performed, even on slippery surfaces