What is a clutch?
A clutch is two metal plates in the engine.
When you press the clutch pedal down the plates come apart separating the engine from the
drive wheels allowing you to change gear.
Bringing the pedal back up re-engages the plates which in turn connect the engine to the drive wheels.
As your car engine is constantly running,
a clutch is needed to separate the engine from the drive
wheels when you stop the car.
Pressing the clutch down just before you stop
does just this, otherwise the car would stall.
