Final answer:
The dermis is the layer of skin that provides strength, form, and flexibility.
Step-by-step explanation:
The layer of skin that provides strength, form and flexibility is the dermis.
The dermis is the inner and thicker layer of skin. It consists mainly of tough connective tissue and is attached to the epidermis by collagen fibers. The dermis contains many structures including blood vessels, sweat glands, and hair follicles. It also provides strength and elasticity due to the presence of collagen and elastin fibers.
In summary, the dermis is the layer of skin responsible for providing strength, form, and flexibility.