Rigidbody Angular Drag (angular resistance):

Rigidbody Angular Drag (angular resistance): Also refers to air resistance, but is used to hinder the rotation of the object. If set to infinity, the object will stop spinning immediately. If set to 0, the object will turn sideways during the ascent.

Freeze position/rotation(frozen position/rotation): The position/rotation of the object on the X, Y, z three axes can be locked, even if the corresponding force does not change, but can be modified by the script. Otherwise the object will rise in the process of flapping (not only the y-axis change, x,z is also changing, do not want this phenomenon, the x,z lock)

Rigidbody Angular Drag (angular resistance):