The shape of the external ear is maintained by elastic cartilage.
d.
Answer: Option D. Elastic Cartilage
Explanation:
The external part of ear consist of Pinna and the external auditory meatus which is maintained by elastic cartilage.
pinna helps in collecting the sound waves and auditory meatus that leads from the exterior to the tympanic membrane.
The elastic cartilage, the matrix is consist of the dense network of elastin fibres and provides support with some elasticity.
Hence, the correct option is D.