What are the two bones that form the sides of the head and ear region called?

The correct choice identifies the temporal bones, which are crucial in the structure of the skull, particularly in the head and ear region. These paired bones are located on either side of the skull and are integral to the formation of the lateral parts of the cranium.

The temporal bones house structures essential for hearing and balance, including the inner ear components. They also connect with the jawbone through a joint, allowing for movement necessary for chewing and speaking. This anatomical positioning and functional significance underline why the temporal bones are accurately identified as the bones forming the sides of the head and ear region.

In contrast, the frontal bones form the forehead and the front part of the skull but do not contribute to the sides or ear region. The maxilla consists of the upper jaw structure and plays a role in the facial skeleton rather than the lateral head structure. Zygomatic bones contribute to the cheeks and the sides of the face, but they are not involved with the ear area. Therefore, the temporal bones are the only correct choice for defining the sides of the head and ear region.