D. is the correct answer.
<span>Earthquakes usually occur near deep mountain ranges deep sea trenches and volcanic activity</span>
Similarities :Both alluvial fans and deltas deposit sediment.
Difference:
A delta forms when a river empties into a larger body of water. An alluvial fan forms on land where a river emerges from a mountainous area and flows out onto a more gently sloping plain. The decrease in slope causes the river to decelerate and deposit sediment, forming an alluvial fan.
The answer is B.......B.....
It will shift to the left as population decreased.
