Answer: Option D.
Epithelial tissues.
Explanation:
Epithelial Tissues are tissues that are composed of cells that are packed in sheet and tightly connected to each other. These tissues covers the body surfaces, lines body cavities, lines internal organs and forms gland. An example of epithelial tissue is the epidermis, an outer layer of the skin.
Epithelial Tissues functions in secretions, protection, selective absorption, filtration, excretion e.t.c in the body.
