Which type of joint allows for internal and external rotation, as well as bending?

The ball-and-socket joint is the correct answer because it is designed to allow a wide range of movement. This type of joint consists of a spherical head of one bone fitting into a cup-like socket of another bone, which provides the capability for internal and external rotation as well as bending (flexion and extension).

For example, the shoulder and hip joints are ball-and-socket joints, allowing for various movements in multiple planes. This flexibility is crucial for activities that require complex limb motions, such as throwing or reaching.

In contrast to this, a hinge joint, such as the elbow or knee, primarily allows for bending and straightening motions (flexion and extension) without the ability to rotate. The pivot joint, found in the neck (for example, between the first and second cervical vertebrae), permits rotation but lacks the versatility of bending movements. Lastly, fibrous joints, such as those found in the skull, are immovable and do not permit any significant movement at all.

The characteristics of a ball-and-socket joint make it unique in its ability to support both rotational and angular movements, making it the best answer for this question.