Which of these human activities is most likely to cause incidences of human skin cancer to increase? a. use of hair spray containing chlorofluorocarbons b. use of solar panels instead of fossil fuels for energy production c. increased consumption of beef, which increases methane production d. burning of plastics in open burn barrels

Skin cancer is caused by DNA damage in the skin and mucous membranes from exposure to UVA and UVB rays. The stratospheric ozone layer protects the planet from  harmful  ultraviolet radiation by absorbing it. CFCs (Chlorofluorocarbons) from spray cans, refrigerants and hair sprays causes depletion of the ozone. Ozone loss increases exposure to ultraviolet rays that can increase incidences of human skin cancer.

since you have not provided the options here i   am going to give you general overview about hormone.hormone are actually the part of endocrine system in our body and produced by the endocrine glands. the hormones act like a chemical messenger   within human body. once produce by the glands they   travel through the blood stream and reach at specific or target tissue and organs   which result in control of our body function. the hormones are specific in their work and work on only the targeted tissue or organ   . with the of hormone endocrine system regulate the heart rate , metabolism, our mood and   growth as well as the development and even the sleeping cycle etc. they actually are the messenger for body cell and organs .