Concept:A tissue is a group of cells which have a similar structure and perform a common function.
Explanation:The leaf epidermis is the outermost protective layer of the leaf.
It is made up of closely packed cells.
These cells are almost identical in shape, size and structure.
All of them work together to perform the same protective function.
Because the cells all possess a similar structure and function, they form a tissue.
The other options simply describe properties of epidermal cells, such as allowing light to pass, having a waxy cuticle, or permitting osmosis.
These properties do not explain why the epidermis is considered a tissue.
Tissue classification depends on the similarity of the cells and their shared function.
Answer:C. all possess a similar structure and function