PLSSS HURRY IM ON A TIMER TH Early civilizations changed their natural environments by:

A. digging canals to control the flows of rivers
B. using slash and burn agriculture to help forests grow
C. Using terrace farming to make the soil more fertile
D. draining all the water out of large rivers

 Using terrace farming to make the soil more fertile

answer: the risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: