What describes extreme turbulence?

Extreme turbulence is characterized by severe and unpredictable movements of an aircraft, where it is violently tossed, making it nearly uncontrollable for the pilots. During such conditions, the aircraft may experience rapid and intense changes in altitude and attitude, which can lead to significant challenges in maintaining control, even for skilled pilots. In extreme turbulence, safety concerns are heightened as passengers, crew, and unsecured objects can be at risk of injury due to the violent nature of the turbulence.

The other descriptions do not accurately represent the nature of extreme turbulence. For example, slight pitch variations would suggest milder conditions, while little to no change in flight dynamics and stabilization of altitude are indicative of calm or stable flying conditions, which are the opposite of what is experienced in extreme turbulence.