A and b bid population=lot of devastation:)
Natural increase is the difference between the number of births and number of deaths during a year. As it is a natural increase it means there are more births then deaths in a year increasing the population.
Answer:
The biggest problems they had to face were themselves. They had to face the fear of being in a new place, the fear of failure which could result in their deaths. They faced their other characteristics as well, when they finally were able to settle and became confident they then faced their ego.