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:
Oop I chatted didnt answer oop here hope this helps xD
mountainous core, Caribbean lowlands, and finally Pacific coastal plain. hope that helps!
Explanation: “how many times did I say hope that helps...”
;D
Resources are devoted to war efforts, companies get shut down, productions slows as soldiers leave for battle