Answer:
wheat
Explanation:
wheat was not just for americans it was also for europe as they struggled to grow wheat
It was constantly attacked by foreign countries and this made it get weaker
Germany
Denmark
Netherlands
Explanation:
- Some of the countries are in the first ten in one area, but not in the other.
- For example, United States are second in the area of productivity index, but are on the 13th place when it comes to human development.
- What is interesting that European countries, especially Scandinavian countries are high on both lists.
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It was the most powerful civilization
