Answer:
Yes.
Explanation:
Yes, an Incan would have described this achievement as “clever” because he/she wouldn't have thought that such limited land would produce so many corns. The fact that only a small portion of the land could grow corns was hampering the food supply of the Incan people.
When irrigation channels were constructed on the demands of the king, land became more fertile and the production of corns increased rapidly. This was truly a clever achievement for the Incas who had limited fertile land to grow corns.
Well, i think the answer would be : Standardized weight and measures
Standardized weight and measures first developed by the muslim merchants in Cairo. Before this standard, Length was measured by the length of one's body.
For example to measure silk, the usually used the term such as 1 arm length.
The thing is, many traders started to hire shorter people to measure this to gain profit , making exchange often became problematic
hope this helps
Answer:
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Malaria
Dr. John Gorrie practiced medicine in Florida. He experimented with ways to prevent the spread of malaria. The summer of 1841 was a particularly bad summer for malaria infection. People had not yet realized that malaria was spread by mosquitoes. (That discovery didn't occur till the 1890s.) Dr. Gorrie, noting that malaria was unlikely to occur in colder climates, thought that perhaps cooling the air in the sick rooms of his patients could help them. He started with the idea of using a fan to blow air across a bucket of ice. A rudimentary beginning to air cooling and refrigeration ... but as they say, the rest is history!
Rapid economic growth
New products and technologies improved middle calss way of life
Most Americans wanted political and social reform
Corrupt politics
