Answer:
No
Explanation:
It should just stay the way it is.
Cyanobacteria, also known as "blue-green algae", are the unicellular organisms which are able to produce oxygen.
Approximately 540 years ago, the atmosphere was very poor on oxygen. Cyanobacteria are thought to be responsible for the oxidization of the atmosphere back then, in an event known as <em>"The Great Oxygenation Event"</em>. As a result, Earth's life forms suffered drastic changes in their composition, as they evolved from being <em>anaerobic</em> to becoming organisms <em>highly dependant</em> on oxygen. The oxygenation of the atmosphere would eventually provide the adequate environment in order for the <em>Cambrian Explosion</em>, or the first diversification of living organisms, to happen.
In ancient times, powerful kingdoms also arose in East Africa. The kingdom of Kush thrived on the Nile River for hundreds of years. The kingdom benefited from its location on the Red Sea. It was an important stop on the trade route linking Africa, the Mediterranean, and India.
C. As more towns were founded, people began to feel more isolated and less connected
Depends on the time period, but a theme was that money changers stimulated trade and help in the development of growing economies as the trade between different regions occur or happen during that time period.
