Explain how weight and balance impact flight controls.

Improper weight and balance can indeed lead to control issues and reduced performance, making this the correct choice. The distribution of weight within an aircraft affects its center of gravity, which is critical for stability and control. If the center of gravity is too far forward or aft, it can result in difficulties in controlling the aircraft’s pitch, yaw, and roll. For instance, a forward center of gravity can make the aircraft harder to pull up into a climb, while an aft center of gravity can lead to an increased risk of stalling.

Additionally, weight influences the aircraft's performance characteristics, such as its climb rate, fuel efficiency, and stall speed. When the aircraft is not balanced within the prescribed limits, it can lead to reduced aerodynamics and make it harder for the pilot to maneuver safely. Thus, maintaining proper weight and balance is crucial for ensuring that the aircraft performs as intended and remains easy to control throughout its flight envelope.

In contrast, the other options suggest that weight and balance are either negligible or counterproductive, which undermines the essential role that proper weight distribution plays in flight control and overall aircraft performance.