**Core Concept**
Elastic cartilage is a type of connective tissue that provides flexibility and elasticity to certain parts of the human body. It is characterized by a high concentration of elastic fibers, which allow it to stretch and return to its original shape. This type of cartilage is found in areas where movement and flexibility are essential.

**Why the Correct Answer is Right**
Elastic cartilage is composed of chondrocytes embedded in a matrix of collagen fibers, glycosaminoglycans, and elastic fibers. The elastic fibers, specifically elastin, provide the necessary elasticity and resilience to the cartilage. The trachea, external ear, and epiglottis are common locations where elastic cartilage is found due to the need for flexibility and movement.

**Why Each Wrong Option is Incorrect**
* **Option A:** Not specified.
* **Option B:** Not specified.
* **Option C:** Not specified.

**Clinical Pearl / High-Yield Fact**
Elastic cartilage is found in areas where movement and flexibility are essential, such as the external ear and epiglottis. This is due to the high concentration of elastic fibers, which provide the necessary elasticity and resilience to the cartilage.

**Correct Answer: C. Trachea, external ear, and epiglottis.**