An investment with a stable and predictable history will most likely have

no risk.
low risk.
medium risk.
high risk.

This investment will most likely have a low risk. The term risk for an investment is a term which describes the possibility of a difference between the actual and the expected return on investments. This investment most likely has a low risk because the return is predictable based on its historical data and there is nothing called no risk investment.

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.