Why are the tops of mountains round and the soil often rough, rocky, and thin in many places in the northeast?

the early settlers abused and overused the land.

glaciers scoured the landscape, grinding the high places and mixing the soil with rocks.

the indian population purposely destroyed the countryside when they discovered the white settlers would not leave.

during the past three centuries, the urban dwellers in the area have appropriated the fine soil for the cities.

Which is an accurate description of the physical characteristics of poland? its fertile soil is found only along riverbanks, and its mountainous region in the northwest has few mineral resources. it is mostly flat with fertile soil except in the east and northeast, and the mountainous region in the south has large deposits of coal and copper. it is covered with thick forests, and it has large reserves of coal, petroleum, and natural gas. its landscape is dominated by plateaus, mountains, and high ridges, and it has large deposits of sulfur and copper in the northeast.