Which is an accurate description of the physical characteristics of poland?

Poland is mainly flat landscape; fertile soil is found except in the east and northeast regions; many lakes; and large deposits of copper, coal, and sulphur in the northeast.

Poland mainly has a flat landscape with an average elevation of 173 meters and only along the southern boarders is has an elevation greater than 500 meters. The highest point is 2499 meters and it is Mount Rysy. Much land along the Gulf of Gdansk is below sea level.  

The largest topography is the lowlands and it also boasts on some of the coveted natural resources such as coal which is present in high abundance, sulfur, natural gas, and etc. The north region has more than 2000 lakes with dense forests and sparse population.