How does pressing down on the gas-pedal result in faster piston movement?

So when we accelerate, what happens in the engine, to move the pistons faster, is it brake related?, physics related? fuel related?
A simple explanation is that when you press on the gas-pedal more fuel is fed into the engine and the vehicle's speed increases [1]. To what extent and how rapidly your vehicle accelerates is determined by the force you apply to the gas pedal and for how long you apply that pressure [1]. The oxygen sensor monitors the exhaust emissions to analyze the air-fuel ratio passing through the engine. Your car requires the right amount of fuel and the right amount of air to burn properly in the cylinders to gain proper acceleration [2]. These sensors send information regarding fuel consumption using the computer unit in the engine. If the sensor is damaged an incorrect amount of air-fuel mix will enter the engine affecting its performance [2]. If the fuel is too rich it may cause slow acceleration even when the pedal is floored [2].
When you step on the gas pedal, you initiate a process that delivers air and fuel to the engine [1]. The throttle pedal is a direct line to your car’s engine and controls the airflow into the intake manifold [2]. This air is then mixed with fuel, fed either by a fuel rail and fuel injectors, or a carburetor, and is then introduced with spark (like fire), fed by spark plugs, which causes combustion [2, 3]. This causes the engine’s pistons to move down, which rotates the crankshaft [2, 4]. As you step on the gas pedal, the more air is sucked into the intake manifold to be mixed with more fuel, which rotates the crankshaft faster [2, 5].