As a result of the Neolithic Revolution, by 3,000 BCE the world's human population grew to • five hundred thousand. one million. twenty-five million. seventy-five million.

Answer 1

By 3,000 BCE, the world's human population was around five million to ten million. However, given the options you provided, the closest choice would be one million.

It's important to note that different estimates exist for population figures in ancient history due to the limited historical data available. The higher numbers, like twenty-five or seventy-five million, would not align with historical estimates for that time period.