What structure in the skin contains glands, hair follicles, and nerves?

The dermis is the correct answer because it is the inner layer of skin that provides support and nourishment to the epidermis. It is rich in connective tissue and contains various structures critical for skin function. Within the dermis, you can find sweat glands and sebaceous glands, which play essential roles in regulating body temperature and skin lubrication, respectively.

Additionally, hair follicles, which are responsible for producing hair, are embedded in the dermis, and the dermis also contains nerve endings that provide sensory information, such as touch, temperature, and pain. These features make the dermis a crucial component of the integumentary system, enabling the skin to perform vital functions and respond to environmental stimuli.

The epidermis, while important for protection and regeneration, lacks these deeper structures and primarily consists of keratinized cells. The hypodermis, which lies beneath the dermis, is composed mainly of fat and connective tissue and serves as insulation and energy storage but does not contain the skin's characteristic structures like glands or hair follicles. The reticular layer, while part of the dermis, refers specifically to the deeper portion and does not encompass the entirety of the structures mentioned in the question. Therefore, the dermis is the most comprehensive answer