What is the primary function of the intake manifold?

The primary function of the intake manifold is to collect and direct air to the engine's cylinders. In an internal combustion engine, the intake manifold plays a crucial role in facilitating proper airflow, which is necessary for combustion. When air enters the engine, it travels through the intake manifold, where it can be mixed with fuel before being delivered to the cylinders for ignition.

This process is essential because the air-fuel mixture needs to be optimal for efficient engine performance, which includes maximizing power output and minimizing emissions. The design of the intake manifold can vary depending on the engine configuration, affecting how air is distributed to each cylinder and influencing factors such as throttle response and overall engine efficiency.

The other options do not accurately represent the primary role of the intake manifold. While it doesn't increase engine temperature or regulate exhaust, it primarily focuses on air management within the engine's intake system.