Sound box of birds is called as: A. PygostyleB. LarynxC. SyrinxD. Synsacrum

The correct answer is C) Syrinx.
The syrinx is the specialized vocal organ of birds that is responsible for the production of sound. It is located at the junction of the trachea and the bronchi, which is different from the human larynx (located in the throat).
1. Syrinx:
o The syrinx is unique to birds and is highly specialized for producing a wide range of sounds. It is capable of creating complex vocalizations that are essential for communication, mating calls, and territorial displays in many bird species.
o The structure of the syrinx allows birds to produce multiple notes simultaneously, which is why some birds can produce such complex songs.
o It is made of cartilage and muscle and can vary greatly in structure across different bird species.
2. Other options:
o A) Pygostyle: The pygostyle is the fused tailbone in birds. It supports the tail feathers and aids in flight maneuvering but is not involved in sound production.
o B) Larynx: The larynx is the voice box in humans and some other vertebrates. While it plays a role in sound production in mammals, it is not the structure responsible for vocalization in birds.
o D) Synsacrum: The synsacrum is a fused set of vertebrae in birds, which is part of the pelvis and helps provide structural support for flight, but it has no role in vocalization.
The syrinx is the sound-producing organ in birds. It enables them to create a variety of sounds, including songs and calls. Therefore, the correct answer is C) Syrinx.