Help

Achievement would go with the good things (improved farming.) isolation would be alone so (limited trade) decline would be a down fall (increased poverty.) exploration is. As the name says exploring so (more trade)

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.