Which of the following components is part of the emissions system?

The catalytic converter is a crucial component of the emissions system in a vehicle. Its primary function is to reduce harmful emissions from the exhaust gases produced during the combustion process. By converting toxic gases such as carbon monoxide, hydrocarbons, and nitrogen oxides into less harmful substances, the catalytic converter plays a vital role in helping vehicles comply with environmental regulations and standards aimed at reducing air pollution.

In contrast, while the water pump, starter motor, and fuel pump are essential components for the overall functioning of the vehicle, they do not directly relate to controlling or reducing emissions. The water pump circulates coolant to maintain engine temperature, the starter motor is responsible for initiating engine ignition, and the fuel pump delivers fuel to the engine. Therefore, the catalytic converter is the only option directly linked to the emissions control system.