Roll, Pitch, Yaw
Roll: Aircraft wings have ailerons (rectangular flaps at the back of the wings). To roll the plane to the right or left, the ailerons are raised on one wing and lowered on the other. The pilot controls the roll of the plane by raising one aileron or the other with a control wheel. Turning the control wheel clockwise raises the right aileron and lowers the left aileron, which rolls the aircraft to the right and vice-versa for turning left.
Pitch: In order to climb higher or descend lower, the pilot adjusts the elevators on the tail. Lowering the elevators causes an airplane's nose to drop, sending the plane into a downward path. Similarly, raising the elevators causes an airplane to climb higher into the sky. This process is called Pitch.
Yaw: It is the turning of a plane. Rudder works to control the yaw of the plane. When the rudder is turned to one side, the airplane moves accordingly. The airplane's nose is pointed in the same direction as the direction of the rudder. The rudder and the ailerons are used together to make a turn.