The term " " refers to the decline in soil quality caused by its improper use.

Soil degradation is the answer to this question.

for (a) a tragedy was considered a main greek drama and it influenced alot of others. for (b) the actors in greek theater were named as aeschylus, sophocles, and euripides and sometimes playwrites. for (e) in a semi-circular theater called the "orchestra.". we'll the question was explain where the namer actors originated.

hope this : d

the answer is d. party organizers, volunteers, voters and elected officials.