Questions: What is the outer ear made of?

The answer is the first one (A): Cartilage.

Explanation for each option:

• A. Cartilage: This is correct. The outer ear, also known as the pinna or auricle, is primarily made of cartilage. This flexible tissue gives the outer ear its shape and allows it to capture sound waves effectively.
• B. Muscle: This is incorrect. While muscles are present in the ear, they are not the primary component of the outer ear. Muscles in the ear are more involved in the movement of the ear in some animals, but not in humans.
• C. Bone: This is incorrect. The outer ear does not contain bone. Bones are found in the middle ear (the ossicles), but not in the outer ear.

In summary, the outer ear is made of cartilage, which provides its structure and flexibility.