The word you're looking for is waning. When the moon's illumination is increasing, it is waxing.
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.
Answer:
Cause they had made a decision in bet-tween them
