The mississippi river is a physical feature as it was discovered during a time where man weren`t capable of such construction in the earth.
They have created agencies. Those agencies created rules and regulations to stop the flow of pollution, etc.
It is tilted closest to the summer solstice and farthest in the winter solstice.
Different perceptions of a region can make that region less defined is true im not a 100% sure tho
The first word is Sink and the second is denser
