The integumentary system has many functions, one of which is multiple choice production of vitamin e. prevention of albinism. protection from cancer. detection of heat and touch. regulation of acid-base balance.

The answer is the detection of heat and touch. The integumentary system consists of the skin, nails, glands, hairs, and nerves. The nerves are responsible for sensing stimuli including pressure, heat, and touch. Another example of its function is acting as a physical barrier against harmful microorganisms and excretion.   

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

the answer is cell division : )