What are the two primary flight instruments used for basic attitude control in the Warrior PA-28A?

The correct response highlights that the two primary flight instruments used for basic attitude control are the altimeter and airspeed indicator. These instruments are essential for maintaining the aircraft's performance and situational awareness, especially during various phases of flight.

The altimeter is vital for altitude awareness, showing the aircraft's height above sea level. This information is crucial for safe operations, particularly in maintaining safe vertical separation from terrain and other aircraft. The airspeed indicator provides critical data about the aircraft's speed through the air, which is essential for ensuring the aircraft is maintained within safe speed ranges, particularly during takeoff, landing, and maneuvers.

While other instruments, like the vertical speed indicator and turn coordinator, also provide important information, they are more supplementary in nature. The heading indicator and artificial horizon, although important for navigation and maintaining level flight, do not serve as the primary instruments for basic attitude control compared to the fundamental role of the altimeter and airspeed indicator. The magnetic compass and aircraft operating manual serve different purposes and are not considered primary flight instruments for attitude control.