What could likely happen if a pilot does not allow a margin above normal airspeed during turbulent conditions?

Allowing for a margin above normal airspeed during turbulent conditions is crucial for maintaining control and ensuring safety in flight. If a pilot fails to do so, the aircraft could reach a speed that is dangerously close to the stall threshold, significantly increasing the risk of stalling. A stall occurs when the wings are unable to produce enough lift due to insufficient airflow, which can happen if the aircraft is flying too slowly in turbulent air. The unpredictable nature of turbulence can lead to sudden changes in airflow, making it essential to maintain an adequate speed buffer to avoid falling into a stall situation.

In contrast, options such as increased fuel efficiency, better climb performance, and improved visibility are unrelated to the immediate risks posed by turbulence and maintaining appropriate airspeed. Turbulence primarily affects the aircraft's stability and control rather than factors like fuel consumption or climb rate when it comes to airspeed management.