Awnser: Humans had been around for tens of thousands of years by the year 1 A.D. when the Earth's population was an estimated 200 million.
Answer:
The theme is 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:
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Robert Hooke invented the Cell
