Darwin's argument tells us that species develop their traits through natural selection due to competition, survival and reproduction. Diversification of species is an important part to make his argument valid because diversification suggest extinction of specie if it doesn't survive.
Unclear, confusing. Because the last half doesn't make sense
Answer: When I was at the start of middle school. I anticipated that middle school work is more advanced than elementary school work. I dealt with it by adapting.
Explanation: None needed.