Which component is responsible for drawing in air and fuel into the engine?

The intake manifold is the correct choice as it plays a crucial role in an internal combustion engine's operation by distributing the air and fuel mixture to the engine's cylinders. Its primary function is to ensure that each cylinder receives the appropriate amount of the air-fuel mixture, which is essential for combustion.

The design of the intake manifold also influences engine performance, as it can affect airflow and distribution to each cylinder, ultimately impacting the engine's power output and efficiency. Additionally, it helps create a vacuum that draws air into the engine when the throttle opens, which is driven by the need for acceleration or engine power demand.

In contrast, while the throttle body regulates the amount of air entering the engine, it does so in conjunction with the intake manifold. The exhaust manifold is responsible for collecting exhaust gases from the engine’s cylinders and directing them to the exhaust system, so it is not involved in drawing in air and fuel. The cylinder head houses the valves and combustion chambers but does not function to draw in air and fuel; its role is in the combustion process after the air-fuel mixture has entered the cylinders.