Which of these structures can be swiveled around in some animals to better locate a sound?

Name: Which of these structures can be swiveled around in some animals to better locate a sound?
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Question

Quizplus · Accepted Answer

The pinna, or outer ear, is a structure that can be swiveled around in some animals to better locate a sound. This is because the pinna is shaped in a way that allows it to capture sound waves from different directions, and by swiveling the pinna an animal can optimize its ability to detect the source of a sound.

Which of These Structures Can Be Swiveled Around in Some