Many North African nations practice Islam because many Muslims traded in that region, so the North Africans converted to Islam, whereas those in Sub-Saharan African nations were more prone to Christianity because of the trade they did with Europeans.
The atmosphere had no oxygen it thereby created an environment where only anaerobic organisms could exist. They couldn't make there own food due to lake of oxygen in the atmosphere
Diverse opinions are necessary becuase if you have a small group of people who agree on all of the same things, then you won't get different perspectives and typically things will go unchanged if they don't think of the problem as something that affects them.
Hope this helps!
