Alpha protections is indicated by the:

Alpha protections are indicated by the top of the black and amber strip along the speed scale on the airspeed indicator. This specific strip signifies the envelope of angle of attack protections implemented by the aircraft's flight control system. When the aircraft approaches a critical angle of attack that could lead to a stall, alpha protections activate, providing guidance to the pilot regarding safe operating conditions.

Understanding why this specific indication matters is crucial for pilots; it helps them maintain control of the aircraft during critical phases of flight. By recognizing the alpha protection strip, pilots can gauge their proximity to stall risk and adjust their flight parameters accordingly, ensuring safety and optimal aircraft performance. The other choices do not accurately represent the alpha protection area, which is uniquely defined by the black and amber strip combination, specifically designed for this purpose.