Identify the diagram and related function. Simple Squamous epithelium - Secretion and absorption. Compound epithelium - Protection. Compound epithelium - Diffusion. Simple cuboidal epithelium - Diffusion.

Correct option is C. Compound epithelium - Protection. Stratified epithelium also known as compound epithelium differs from simple epithelium in that it is multilayered. It is therefore found where body linings have to withstand mechanical or chemical insult such that layers can be abraded and lost without exposing subepithelial layers. Cells flatten as the layers become more apical, though in their most basal layers the cells can be squamous, cuboidal or columnar. So, the correct answer is "C".