Answer:he Gold Rush, as it became known, transformed the landscape and population ... by gold-tinted visions of easy wealth and luxury, life as a forty-niner could be brutal. ... prospectors did become rich, the reality was that gold panning rarely turned up ... Vigilante justice was frequently the only response to criminal activity left ...like michael jacksonExplanation:
The answer is b. continental break-up. During this time, the continents began to
form and also separate in different areas. It was also the time of mammals as
dinosaurs were now extinct, mammals began to flourish in the earth. The climate
was now cooling down during this period.