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Earlier discussion
2 older comments kept for context.
Oluwaseun Adeyemi
Root hair is a hairlike outgrowth of a plant root that absorbs water and minerals from the soil. Root hairs are tubular extensions of the epidermis that greatly increase the surface area of the root. They are constantly dying off and being replaced by new ones as the root grows and extends itself into the soil.
roghe
the answer should be D) piliferous layer