Answer:
D. Jaws and paired appendages
Explanation:
Two pairs of appendages are present in sharks, birds and salamanders. In the shark (fish) these appendages are fins, while in birds and salamanders (land vertebrates) the appendages are limbs.
Sharks, birds and salamanders also have jaws. The jaw is an opposable articulated structure, typically used for grasping and manipulating food. Most vertebrates have jaws.
A) it is NOT ture because sharks don't have lungs.
B. it is NOT true becasue salamanders are not endothermic.
C) it is NOT ture because sharks are NOT four-limbed.
