Out of the three, only 1 is acidic because litmus paper turns red in acidic compounds and blue in basic compounds.
sunlight..........................
It is called the Epidermis. 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.
Try hypothesis. If that's not it, I don't know what else it could be.
