Which of the following is an example of a benefit that people receive when they alter the Earth’s environmental spheres? A.
pollution
B.
terracing
C.
acid rain
D.
eutrophication

Eutrophication

Explanation: It is known that some aquatic life are poorly fed due to absence or low production of organic matter by photosynthesis. Some waters are poorly fed due to lack of certain important elements like nitrogen and phosphorus and this has cause the death of some aquatic life especially those from oligrotrophic water source.

Eutrophication is one of the benefit that we receive as human to provide the aquatic life with necessary nutrient and organic matter resulting in high biological productivity.

answer; the correct answer is (composition);

the values of the selma marchers was to bring   their ability to vote into law. mlk was not hat march, which was protesting toward lbj