Which lever allows the spoilers to be lowered as speedbrakes?

The speedbrake lever is specifically designed to control the deployment of the spoilers as speedbrakes on the A320 aircraft. When the speedbrake lever is raised, it activates the spoilers, which increase drag and decrease lift, allowing the aircraft to slow down more effectively during descent or on landing. This function is crucial for pilots when managing speed and descent rate, particularly in approach and landing phases.

The other levers mentioned have different purposes: the throttle lever is utilized for engine power control, affecting thrust and speed; the flight control lever typically refers to controls for surfaces that manipulate the aircraft's attitude and flight path; and the flap lever is used to extend and retract the flaps, which aids in increasing lift during low-speed flight but does not directly control spoilers. Therefore, the speedbrake lever is the dedicated control for deploying spoilers specifically as speedbrakes, making it the correct choice.