Here's why:

* Stratified epithelium is characterized by multiple layers of cells.

* While all cells in a stratified epithelium are connected to the basement membrane, only the basal layer of cells directly rests on it.

* The cells in the upper layers do not reach the basement membrane but are attached to the cells beneath them.

This structure allows stratified epithelium to provide protection and durability against abrasion and other stresses.

Let me know if you'd like more details on different types of stratified epithelium!