The answer to the question is c) Check
Answer:
Agricultural yields were about 2 tan (a unit of about 110 pounds or 50 kilograms) of grain per mu during the Song dynasty, compared with 1 tan during the early Han and 1.5 tan during the late Tang.
Explanation:
The inland tribes such as the Algonquians were the Indians who had the greatest opportunity to adapt to the European incursion.
Among all the North American native language groups, the Algonquians are the most widespread and jam-packed and a lot of people identify themselves with a lot of Algonquian people.
The four river valley civilizations were the Tigris & Euphrates Valleys, the Nile River Valley, the Indus River Valley, and the Yellow River Valley. Civilizations developed around rivers because their waters provided places to hunt and fish. Also, as the rivers flooded, the lands around them became fertile.