Which control surfaces are considered primary flight controls on an ERJ aircraft?

Primary flight controls are essential for the aircraft's basic maneuverability and control during flight. In the context of the ERJ (Embraer Regional Jet) aircraft, the primary flight controls encompass the ailerons, elevators, and rudders.

Ailerons are used to control the roll of the aircraft, allowing it to bank during turns. Elevators are responsible for controlling the pitch, managing the ascent and descent of the aircraft. The rudder is used to control the yaw, assisting in directional changes and maintaining coordinated flight. This combination of ailerons, elevators, and rudders enables pilots to stabilize and maneuver the aircraft effectively.

The other options predominantly include control surfaces that play supportive roles in flight but are not classified as primary flight controls. Flaps, slats, and spoilers enhance performance and manage lift and drag but do not directly control the basic flight dynamics in the way that the ailerons, elevators, and rudder do.