The correct answer is option 3, Protochordates. Jaws are absent in protochordates, which are a subphylum of chordates. Protochordates include organisms such as tunicates and lancelets. Jaws are specialized structures found in many animals, including birds, fishes, and reptiles. They are used for grasping and manipulating food. Option 1, Birds, is incorrect because birds do have jaws. Option 2, Fishes, is incorrect because most fishes do have jaws. Option 4, Reptiles, is incorrect because reptiles also have jaws. However, it is important to note that there are some primitive fishes and reptiles that have a type of jawless feeding apparatus called a pharyngeal jaw, which is located in the back of the throat.