List 2 reasons why the population of colonies was growing?

One reason is as natural as they come babies. The colonist whom already settled had a baby boom. Babies were born by young teens and young adults every 2-3 years. Another reason is the soil was fertile which brought many farmers and people so they could start businesses.

Explanation:

Most likely not. I'm assuming you mean alliances as in people having allies as countries. So if there had not been alliances between countries, there would not have ended up being a World War because of the fact that it would have stayed between those two countries. It would have been a catastrophe for the throne but it would have stayed between Austria and Bosnia and not have involved the other countries. It may have made a war between those countries and others who thought what happened was right or wrong (as in taking sides) but since they had allies it was more or less required that Austria-Hungary's allies joined in and Bosnia's allies joined on their side to fight something that should've not even happened in the first place.