Answer:
A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment.
Emir is the answer to your question
We can solve it bu:
1 Education:One of the biggest problems concerning urban sprawl is lack of education. ...
2 Community Action.
The community can be a solution to urban sprawl through involvement and action.
3 Smart Growth.
4 New Urbanism.
Basically it means when something is moving in a line and is rotating in a larger system at the same time it appears to move. If you look it up online you can easily find a picture or two that should explain it pretty well.