**Core Concept**
Elastic cartilage is a type of cartilage that is rich in elastic fibers, allowing it to maintain its shape and provide flexibility to the structures it supports. It is found in areas where high flexibility and resistance to compression are necessary.

**Why the Correct Answer is Right**
Elastic cartilage is composed of dense networks of elastic fibers and chondrocytes embedded in a matrix of collagen and proteoglycans. This unique composition provides the necessary elasticity and compressive strength to support structures such as the external ear, epiglottis, and laryngeal cartilages.

**Why Each Wrong Option is Incorrect**
**Option A:** Fibrocartilage is not a type of elastic cartilage, but rather a type of cartilage that is rich in dense collagen fibers and is found in areas subject to high tensile stress, such as the intervertebral discs and pubic symphysis.
**Option B:** Hyaline cartilage is a type of cartilage that is rich in chondrocytes and is found in areas such as the articular surfaces of bones and the trachea.
**Option C:** None of the options provided are types of elastic cartilage, but rather types of cartilage with different compositions and functions.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that elastic cartilage is found in areas where high flexibility and resistance to compression are necessary, such as the external ear and epiglottis.

**Correct Answer:** D. All of the above.