Dear student you should ask single query rather than dozens of queries in a single thread.
The changes in the earth's surface by river,glacier,sea-waves,winds can be seen in the form of various landforms formed by these agents of erosion such as:
Rivers:V shaped valleys,waterfalls,rapids,alluvial comes etc.
Sea waves:Coastal cliffs,caves,stacks etc.
Glaciers:U shaped valleys,Hanging valleys,cirques.
Winds:Mushroom rocks,zeugen,yardang,inselbergs.