Answer:
Loess.
Explanation:
The Yellow River is the second longest river in China and the fourth longest single river on earth. There are different numbers for its length, depending on the measurement method: 4845 kilometers is the most common one. Its catchment area covers 752,443 km². The river takes its name from the yellowish color that is created by loess that has been removed and washed into the river via streams and tributaries, which in turn fertilizes the land when it floods over its streams, making fertile land on its way.
 
        
             
        
        
        
Answer:
Delta
Explanation:
Delta is a geographical term that describes the formation of wetlands. It is formed from the slow movement of water and deposit from a river into a larger water body. For example lake, sea and ocean. A vivid example is a place where the River Nile moves at a slower pace into the Mediterranean Sea.
Hence, in this case, as a river reaches its mouth it is often affected by incoming tides resulting in a formation called a DELTA.
 
        
             
        
        
        
The correct answer is - As the hot magma exists the MOR, it shoots up higher than the surrounding crust.
The mid-ocean ridges are linear mountain chains on the ocean floor. They appear on places where there are divergent boundaries, meaning where two or more plates are moving away from one another. 
As the plates move away, they leave thinner crust and gaps behind them, so the high pressure from the mantle manages to push upward the magma with ease. As the magma pushes upward it manages to move up the ocean floor as well. The magma cools of very quickly, thus creating new crust in no time. This new crust sits higher than the older one because the magma manages to push upward the ocean floor itself. Since the magma is continuously coming up and creates more and more new crust, it also gets out much higher because it makes a mountain of very hard igneous rocks around the source, thus constantly coming above the layers formed before.
 
        
             
        
        
        
Answer:
like unemployment,waterlogging in wetland areas,salinity in arid and semi arid areas,acidity in high rainfall and so on...