The correct answer is: C. Internal ear
Snakes have a very keen sense of hearing, and they can detect even very faint sounds. They do this by using their internal ear, which is located in their skull. The internal ear is a complex organ that contains a number of sensory cells that are sensitive to sound waves. When sound waves enter the ear, they cause the sensory cells to vibrate. These vibrations are then converted into electrical signals that are sent to the brain. The brain interprets these signals and allows the snake to hear.
The other options are incorrect because:
- A. Tympanum is a membrane that is found in the middle ear of mammals and birds. It vibrates in response to sound waves, and these vibrations are then transmitted to the inner ear. Snakes do not have a tympanum.
- B. Body Snakes can feel vibrations through their body, but they do not use this sense to hear.
- D. Earth Snakes can also feel vibrations through the ground, but they do not use this sense to hear either.