Which of the following correctly describes the behavior of diamagnetic materials?

Diamagnetic materials are characterized by their unique response to external magnetic fields, which involves a weak, negative susceptibility to magnetization. When placed in a magnetic field, these materials develop induced magnetic fields that are oriented opposite to the direction of the applied field. This results in a repulsion effect, meaning that diamagnetic materials are repelled by external magnetic fields.

This property arises from the electronic structure of diamagnetic materials, where all of their electrons are paired. When exposed to an external magnetic field, the paired electrons create a small magnetic field that opposes the applied field. As a result, they do not maintain a permanent magnetic moment and only exhibit this behavior when subjected to an external magnetic field.

In contrast to diamagnetic materials, ferromagnetic and paramagnetic materials are attracted to magnetic fields due to their unpaired electrons or intrinsic magnetic moments. Therefore, the correct choice regarding the behavior of diamagnetic materials is their repulsion from external magnetic fields.