Answer:
From the triangles, I think the congruence statement would be that of the ASA theorem. Triangle AWC is congruent to triangle RWC by virtue of the Angle-Side-Angle theorem. hope I helped ;)
Explanation:
 
        
             
        
        
        
The North Sea has very important natural resources such as oil and natural gas. Oil is a mixture of organic compounds, mainly hydrocarbons insoluble in water, it is also known as crude oil or simply crude and gas natural which is an important source of fossil energy released by its combustion. 
        
                    
             
        
        
        
I believe the answer is a.
        
                    
             
        
        
        
The correct option is LOESS.
Loess refers to a compacted yellowish deposit of wind blown sediments which is usually found extensively in the mid latitudes. Loess is formed by the accumulation of dust that had been blown by the wind. Scientists believed that about 10% of the earth's land area is covered by loess.<span />