The epidermis of the skin consists of many layers of tightly packed cells. the outermost layer of cells are dead. which best describes why this occurs?
chemical compounds containing digestive enzymes are located on the outside of the skin, and they destroy the cells.
blood vessels are not located in the epidermis, but in the underlying dermal connective tissue.
the outer layer of skin is nervous tissue and nervous tissue will not regenerate.
pathogens on the skin secrete toxins that affect the cellular structure, thus destroying the cell.

b

Explanation:

because i said so

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.