A girl is going out with her friends to eat ice cream while the sun is pointing at them. Explain how the three layers of the skin is protecting them from the sun

Skin has three layers: The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands. The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue and
Stratum Basale (bottom layer). Sits directly on top of the dermis. This layer furnishes cells to replace those lost in the upper layers of the epidermis. Melanin is formed here to protect against ultraviolet radiation.

Ibelieve the answer is d.

Bmust be the answer, as technically all organs move, so a is incorrect. all organs are made of different types of cells, so that isn’t a problem, so c is also incorrect. human hearts are very similar to many other animals’ hearts, so d is also incorrect, yet the heart is made of muscle, which is hard to grow in the lab so it would be correct to say b