Korea was required to provide regular tributes to china, while japan was required to provide tributes less frequently
It's A
Irrigation was overused, the soil didn't get any rest (crop rotation is a younger invention), the result was salinization of the soil, which led to decline of Sumer.
Answer:
The economic and social changes of the early 20th century greatly influenced the North American and European worldview which, in turn, shaped the development of new styles of art. Artists began to question and experiment with themes of reality, perspective, space and time, and representation.
