Which sediment type requires the least amount of energy to be eroded

Aseasonal prevailing wind in the region of south and southeast asia, blowing from the southwest between may and september and bringing rain (the wet monsoon ), or from the northeast between october and april (the dry monsoon ).

The phase where ice changes directly to gas is called sublimation 

Pretty sure it's d. heterogeneous is separated by physical properties. 

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).