Explanation:

 1.  Rift valley, any elongated trough formed by the subsidence of a segment of the Earth’s crust between dip-slip, or normal, faults.  The most extensive of the continental rift valleys are those of the East African Rift System, which extend northward to the Red Sea and eastward into Indian Ocean.

2.  Fold mountains are mountains that form mainly by the effects of folding on layers within the upper part of the Earth's crust.  Examples:  Himalayas, Alps, Appalachians, Rockies, Andes.

3.  Block mountains are created when large areas or blocks of earth are broken and displaced vertically.  The Rhine Valley and the Vosges mountain in Europe are examples.

4.  Volcanic mountains are formed due to volcanic activity.  Kilimanjaro in Africa and Mt.Fujiyama in Japan are examples of such mountains.