Which component is responsible for transmitting power from the engine to the wheels?

The component that is responsible for transmitting power from the engine to the wheels is the transmission. The transmission plays a critical role in the drivetrain of a vehicle by converting the engine's power into usable torque for the wheels. It allows the engine to operate efficiently at different speeds and loads by adjusting the gear ratios.

When the engine generates power, it turns the crankshaft, and the transmission takes this rotational force and directs it to the driveshaft, which then turns the wheels. The transmission is designed to shift gears appropriately, enabling the vehicle to accelerate smoothly and efficiently, regardless of the speed or road conditions.

In contrast, the other components listed serve different functions. The alternator generates electrical power to charge the battery and power electrical systems in the vehicle, but it does not play a role in transmitting power to the wheels. The starter motor is responsible for starting the engine but does not engage during normal vehicle operation. Finally, the exhaust system deals with directing engine gases out of the vehicle and does not contribute to power transmission. Understanding the function of the transmission and how it integrates with the rest of the drivetrain is essential for automotive technicians.