Answer;
-Thoracic
Thoracic because of the rib facet on the body and elongated spinous process
Explanation;
-Thoracic Vertebrae functions to hold the rib cage and protect the heart and lungs. The twelve thoracic vertebrae are numbered T1 to T12. The range of motion in the thoracic spine is limited.
-Distinguishing features of the thoracic vertebrae include; the presence of facets on the sides of the bodies for articulation with the heads of the ribs, and facets on the transverse processes of all, except the 11th and 12th vertebrae, for articulation with the tubercles of the ribs.
They are a species that is closely related to, but distinct from, Homo sapiens.
Hope this Helps
Answer: The answer is the last option, Backflow of blood through a defective valve.
Explanation: Hypotension causes high blood pressure, and the other two options are not related to heart murmurs. A hear murmur is when the blood isn't flowing in the right direction causing the hear to beat irregularaly.