How do the epithelial tissues act as a savior for us?

Epithelial tissue is one of the four main types of body tissue found in your organs and covers internal and external surfaces in your body. It has several different structures and functions depending on where it is in your body.

The epithelial tissues serves as a barrier and protection between internal cells and the dirt and microbes in the environment. It is what gives humans the ability to stretch, to move our fingers and arms in many positions.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.