Biology

The correct answer is A. Integumentary.

The integumentary system includes the skin, hair, and nails. It is responsible for protecting the body from external factors such as pathogens, UV radiation, and physical injuries. Additionally, it helps regulate body temperature, prevents water loss, and houses sensory receptors for touch, pressure, pain, and temperature.

Option B, the nervous system, consists of the brain, spinal cord, and nerves. Its primary function is to coordinate and control bodily functions and transmit signals between different parts of the body. While the skin contains sensory receptors that provide information to the nervous syste...