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Answer:
The Fourth option (A and D)
Explanation:
Sideways movements have the highest speed and inercia, so these sites experience the highest erosion rates. Letters D and A, show the places with sideways, so this is the combination where erosion exceeds deposition rates. The correct option is the fourth one, D and A.
For example, in point A
This place represent a far point from the strem. In this place the mass of water is higher, so its erosional effect is increased. Along with this, speed increases as water has more space to flow
On the contrary, in point B deposition rate is increased as the topography obstructs water flow.
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