Can someone help me with this. Biology

How conditions changed in the american south over the final decades of the 1800s for african americans. consider black politics, black voting, and the rise of segregation

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

What is the definition of evolution