Answer:
A glacier's weight, combined with slow movements can drastically change the landscape. How a glacier can change land is by over several years it can drag broken rocks and soil debris by the ice seeping into the cracks and over time, becomes "one" with the glacier because of repeating melting and freezing. So if the glacier takes the rocks away from one land and places it in another, the lands can either have repeating rocky-landscape and another with a shallow-like land.
There are two ways for a glacier to shape the land, which is through plucking, and abrasion.
Plucking usually takes place at the base of the glacier, where water from the glacier seeps into the soil and rocks openings, it freezes, and the glacier pulls it along; breaking up and pulling rocks with it.
Abrasion usually has the sand-papering type of effect. This means that the rocks.. if picked up, they crash against other rocks at the sides of the glacier, breaking them up.