Answer:
natural disasters..and such
Explanation:
If you live by the shore on lowland, you may have your house or buisness or whatever flood. Hurricanes will absolutely demolish you. Soil erosion may occur. Resulting in plain pollution, plain population is the highest. Many plants can't grow.
I believe the answer is Canals
Answer:
I can't exactly remember how to either but I do know that they hypotenuse is 7 so z cannot be bigger than 7
