Question

which layer of hair is described as the central core made of soft keratin? medulla dermal papilla cortex cuticle

Explanation:

Hair has three main layers. The medulla is the central core made of soft keratin. The cortex is the middle layer and gives hair its strength and color. The cuticle is the outer protective layer. The dermal papilla is not a hair layer but a structure in the skin that provides nutrients to the hair follicle.

Answer:

Medulla