Answer:
In the upper reaches (also known as the source) the gradient is at its steepest because of vertical erosion. This changes further downstream as lateral erosion (side to side) from the river and deposition start to replace vertical erosion as the dominant process. Finally, the river really flattens out as it approaches the mouth as deposition become dominant.
Answer:
I do believe the answer is westernization, simply because easternization talks about countries such as Asia and middle eastern countries while democratization talks about politics.
If there is any questions or i was wrong in any way let me know so i can fix my answer.