The soft lining inside of your mouth is an example of a) cells. b) tissue. c) an organ. d) an organ system.

Option A) Cells

Explanation:

The soft lining inside the mouth is an example of cell.

The inner lining of mouth is made up of  the mucous membrane. Soft lining is consist of squamous epithelium also called as oral epithelium, which is a type of cell.

Epithilial cells are arranged in layers upon a basal membrane. It function to protect mouth against abrasion.

Hence the correct option is A) cells.