Which of the following phrase best defines what an ecosystem is? a. an ecosystem is all of the biotic and abiotic factors in a given area b. an ecosystem is all the organisms living in a given area c. an ecosystem is a large area with a certain temperature and amount of rainfall d. an ecosystem is all individuals of the same species in the same area

The answer is A because:

B is a community

C is wrong because an ecosystem needs life

D is a population

the answer is b: 1.4 km/hr

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.