**Core Concept**
Protective epithelium, such as stratified squamous epithelium, forms a barrier that protects underlying tissues from mechanical, chemical, and thermal damage. This type of epithelium is found in areas like the skin, esophagus, and oral cavity, where it helps to prevent abrasion and irritation.

**Why the Correct Answer is Right**
The characteristic feature of protective epithelium is its ability to withstand mechanical stress and prevent water loss through desiccation. This is achieved through the presence of numerous layers of flat, polygonal cells that are tightly packed together, forming a strong barrier against external insults. The cells in protective epithelium also contain keratin, a protein that provides additional mechanical strength and resistance to wear and tear.

**Why Each Wrong Option is Incorrect**
* **Option A:** This is incorrect because transitional epithelium is a type of epithelium that lines the urinary system and is adapted for stretching and accommodating varying volumes of urine, but it is not protective in nature.
* **Option B:** This is incorrect because pseudostratified columnar epithelium is a type of epithelium that lines the respiratory and gastrointestinal tracts, but it is not characterized by a strong barrier function.
* **Option C:** This is incorrect because cuboidal epithelium is a type of epithelium that lines the walls of glands and ducts, but it is not a protective epithelium.

**Clinical Pearl / High-Yield Fact**
Protective epithelium is an example of a type of epithelium that has evolved to provide mechanical protection to underlying tissues. It is found in areas of the body that are subject to mechanical stress and wear and tear, such as the skin and esophagus.

**Correct Answer: C. Stratified squamous epithelium.**