The answer is...
d. Adolf Hitler
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Answer:
It was the poverty and failure of appeasement across many nations after WW1. The militarism in Japan and German as a direct response to the economic depression caused political tensions and the eventual invasions of other nations for power.
Explanation:
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.
Without the movement of goods, people, and ideas, cities falter, economies wane, and societies wither. As local economies and their associated land uses have become more specialized, mobility has grown ever more central to the sustainability of human activity. Economic specialization, which has fueled productivity growth and propelled the dispersion of interlinked activities worldwide, is premised upon various forms of mobility, including the migration of labor from low-wage to high-wage places, the daily travel of workers from their homes to workplaces, the movement of materials to worksites, and the distribution of finished products to markets. When mobility ceases, as in the case of a natural disaster, not only do workplaces fall idle, but also people cannot get emergency medical attention, families cannot obtain food, and social gatherings of all sorts are canceled or postponed.
1. Cyrus McCormick
2. Sewing Machine
3. Samuel Morse
4. Eli Whitney
5. Cotton Spindle
6. Cotton gin
7. Charles Goodyear
8. John Deere
9. Francis Lowell
