Because nearly all of the crops or livestock raised are used to maintain the farmer and the farmer’s family, leaving little, if any, surplus for sale or trade. Preindustrial agricultural peoples throughout the world have traditionally practiced subsistence farming. Some of these peoples moved from site to site as they exhausted the soil at each location. As urban centres grew, agricultural production became more specialized and commercial farming developed, with farmers producing a sizable surplus of certain crops, which they traded for manufactured goods or sold for cash.
Answer : C
In a chain or a series
In the area of central America in South American continent.
Answer:
Within the eastern hemisphere there are a number of factors that limit human activities:
- low temperatures in northern Russia - soils are frozen, temperatures very low, summers are short.
- the very high altitudes of Nepal, Bhutan, China in the Himalayas
- the cold desert areas of China and Mongolia
Well there is oil,gas,forestry,mining agriculture, farming and ranching
