Changes from building houses to withstand either tsunamis or hurricanes. From changes to the local economy and how the food grows and what needs to be strengthen to adapt to the noticeable weather change. Also from the changes of local and current laws and or codes of laws.
B, both in real history and this chart, America created the first atomic weapons, and Russian spies during WW2 wanted to have the advantage of such power, lest America have a monopoly on pure Force.
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Stage 1: High Equilibrium
High birth rate and high death rate
Stage 2: Early Population Increase
Decreasing death rate, constant birth rate
Stage 3: Late Population Increase
Death rate stabilizes at a lower amount, birth rate decreases
Stage 4: Low Equilibrium
Low birth rate and low death rate
