Which of the following is a definition of kyphosis?
a. a posture disorder characterized by the shoulders being rounded and the back hunched
b. a posture disorder in which the spine curves up the back like a snake
c. a posture disorder characterized by excessive curvature or arch in the lower back
d. none of the above

Kyphosis is excessive outward curvature of the spine, causing hunching of the back.

A. A posture disorder characterized by the shoulders being rounded and the back hunched.

Step-by-step explanation:

Kyphosis a kind of disorder of the spinal cord. In this the spine gets curved outward which results in the abnormal rounding of the upper back. This condition is called as roundback and in cases of severe curvature this is called as hunchback. This condition can occur in any age but it is commonly seen in adolescence.

step-by-step explanation: