The _____ controls the amount of airflow into the engine.

A) throttle valve
B) connecting rod
C) piston
D) main bearing

Throttle Valve

A valve that regulates the flow of air into the engine's intake manifold, controlling the engine's power and speed.

Airflow

The movement of air around or through objects, particularly relevant in contexts such as ventilation, aerodynamics, and cooling systems.

Engine

A machine designed to convert one type of energy into mechanical energy, powering various devices, especially vehicles.