Which two topics are studied by geographers?

The earth rotates on its axis and revolves around the sun every

If we review the changes in the landscape surrounding the great salt lake in utah we can see a change in topography. look at the area to the south of the lake. what changes occurred during the last twenty-nine years? a-erosion of the hills b-an increase in marshland c-flooding of the area and the development of wetlands d-deposition of sediments and an increase in elevation

Which historical event in mediaeval history led to european interest in trade with the middle east