Choose all the answers that apply. homeostasis is a required characteristic for living organisms is controlled by the hypothalamus in animals only occurs at the organism level requires the ability to sense changes in the external environment is maintained in a cell by the cell membrane

of those who start drinking before they're 15 will develop alcohol dependence

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.