Answer:
bcz of moon waves and tides are caused this is a gravitational force called tidal force
Answer:
Earth's rotation around its axis results in the alternation of day and night. Earth also moves around the Sun on the ecliptic plane in an elliptical orbit.
Explanation:
This movement along with the fact that its axis is tilted to the ecliptic plane is causing the changing of seasons.
Just look up 2 mega cities (question)
So like New York City location
New York City brief history
New York City population density
Hope this helps.