Final answer:
Using directional terms, you would say that the spinous processes of thoracic vertebrae are angled posteriorly and inferiorly. Therefore, the correct option is 4.
Step-by-step explanation:
This indicates that each thoracic vertebra's posterior spinous processes, which protrude from its back, are oriented downward as well. "Inferiorly" describes a direction that faces the feet or lower body.
The spinous processes of the thoracic vertebrae are orientated inferiorly, pointing downward, as well as posteriorly, extending backward. awareness the three-dimensional arrangement of the vertebral structures in the spine and their function in supporting and shielding the spinal cord requires an awareness of this anatomical orientation.
Therefore, the correct option is 4.