Roll (Bank) refers to

• A. The Nose Moves Side To Side
• B. The Motion Of The Aircraft When One Wing Goes Up And The Other Goes Down
• C. The Nose Moves Up And Down
• D. The Fuselage Rotates Around Vertical Axis

Answer: (B)

Roll, or bank, is rotation about the aircraft’s longitudinal axis—the line from nose to tail. When you roll, one wing goes up while the other goes down, tilting the aircraft’s wings relative to the horizon. This tilt redirects lift so it has a horizontal component, which starts a turn. It’s different from pitch, which is nose-up or nose-down rotation about the sideways axis, and from yaw, which is rotation about the vertical axis.