The difference between the given topics is described below.
Explanation:
<u>Slope decline</u>:
The decline has been characterized as anything being rejected, downhill, diminished, or sinking from perspective. Somebody else says anything when approached for supper would be an illustration of decline.
<u>Slope retreat</u>:
The gradual retreat of something like a scarp or perhaps the mountainous slope has been considered as an explanation for the erosion of backward as well as downwards.
