**Core Concept**
A tear-drop fracture of the lower cervical spine is a type of injury that occurs when there is a burst fracture of the vertebral body, resulting in a triangular or teardrop-shaped fragment of bone being displaced into the spinal canal. This type of fracture is often associated with severe trauma and can cause significant neurological damage.

**Why the Correct Answer is Right**
The teardrop fragment is typically seen on an anteroposterior (AP) radiograph of the cervical spine, and its presence suggests a burst fracture of the vertebral body. This type of fracture is often caused by a sudden, high-impact force, such as that seen in a motor vehicle collision. The displacement of the teardrop fragment into the spinal canal can cause compression or laceration of the spinal cord, leading to neurological deficits.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a teardrop fracture is not typically associated with a ligamentous injury or a flexion-compression fracture.
**Option B:** This option is incorrect because a teardrop fracture is not a type of fracture that is typically seen in the thoracic spine.
**Option C:** This option is incorrect because a teardrop fracture is not a type of fracture that is typically caused by a fall from a height.

**Clinical Pearl / High-Yield Fact**
In the setting of a suspected cervical spine injury, it is essential to carefully evaluate the cervical spine films for signs of a teardrop fracture, as this can indicate a more severe injury and guide further management.

**Correct Answer: D.**