Means to dichange something .
The correct answer is - D. how to make iron.
The Zhou dynasty was one of the greatest dynasties of China, and among many achievements of their reign, the artisans of this dynasty managed to learn how to make iron. This was revolutionary for the Chinese people, and it was of great use in the agriculture after the tools for it started to come in iron version, and it made everything much easier, quicker, and more efficient.
John Locke, because he was the big supporter of unalienable rights or god given rights.
WW1 was the first war to abandon the line styles of "Noble Fighting" found in contemporary Europe. In the old style soldiers walked in line and proceed to shoot each other till the other fled or simply all died. In the horrific new war trenches were dug and six machine gunners could hold off and assault of thousands of contemporary linemen. Doing so led to the horror of trench war which was bloody much more violent and dark.
Flooding rivers helped contribute to the beginning of farming communities because of sediment deposits that would be spread beyond the banks of the river to the land near rivers. This sediment helped to create highly fertile land that could then be used for farming. The mineral rich sediment helped to develop early farming and allowed for the natural cycle of rivers to boost agricultural production.
