Mycenaeans left a large artistic impression on Grecian culture that pushed into a new age of Greek stylized art.
The reason for Ohio population grew that time was because the state disallowed slavery, it was also open to trade. It became an industrial state and also became an area for Native Americans to live. The place was an active area for living and family raising.
By definition a primary source is some king of source where the person that recorded it was actually there for the event, so the closest answer would be it describes an event from a historical perspective
They became powerful by controlling the rich trans-Saharan trade routes between northern and western Africa, especially the gold trade.