What is "Kyphosis" characterized by?

Kyphosis is characterized by an exaggeration of the normal posterior curve of the spine, often referred to as a humpback appearance. This condition typically results in a rounded upper back and can lead to discomfort or pain. The curvature can be due to various factors, including age-related degenerative changes, osteoporosis, or certain developmental conditions.

The term "humpback" is descriptive of the visual appearance of kyphosis, where there is an abnormal increase in the curvature in the thoracic region of the spine. This makes option B the correct choice, as it accurately describes the defining feature of kyphosis. The other options describe conditions that do not pertain to kyphosis, such as flattening or excessive lordosis, which refer to different spinal abnormalities.