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.

10/10 recommend bring pads/tampons with you no matter what. im 16 & i’ve had mine since i was 12 and they’re still it regular, but id suggest using the glow app, many women use it for fertility reasons but i use mine specifically for the period tracking portion and it guesses when your next period will most likely be for the next two months. i dont believe theres any way to delay your period, so id say hope for the best but make sure to bring all of your stuff just incase. have a good cruise!