which kind of joint allows the arms to swing in circles?\no hinge\no ellipsoidal\no ball - and - socket\no…

Brief Explanations:

A ball - and - socket joint allows for a wide range of motion including circular motion. Hinge joints allow mainly back - and - forth movement like a door hinge. Ellipsoidal joints have a more limited range compared to ball - and - socket. Sliding joints allow bones to slide past each other.

Answer:

C. ball - and - socket