Answer:
c. they form adjacent to an intruding pluton, which provides heat for metamorphism.
Explanation:
- In metamorphic rocks, the contact metamorphism produces the aureoles in the surrounding zones of the rocks that get altered. 
- There varies in the thickness from the from centimeters to several kilometers like the large granitic intrusions and they typically consist of non foliated rocks formed due to the heat sources and intruding plutons.
 
        
                    
             
        
        
        
Answer:
Erosion can cause water in the rivers to become heavily polluted. The water might carry pesticides, heavy metal ions and other toxic wastes. When this water will be used for irrigation purposes, the growth of plants will be heavily affected by them. 
When humans use water this contaminated water from the rivers, it will led to many diseases in humans. Also, the wild- life animals which depend on this river might take in toxic compounds due to which they might die. 
 
        
             
        
        
        
Answer:
C) Ranching.
Explanation:
Basque settlers are settlers who have their origins in Spanish, Mexican, and other Hispanic roots. The Intermontane West were settlements of Native Americans and they were surrounded by rivers. The Spanish people were the first European settlers in this region. They made their living through ranching. 
Today, the Intermontane West comprises of cities like Las Vegas, Utah, Nevada, etc. Tourism is also prevalent in this region as there are many interesting sights in the region. The region is surrounded by mountains and plateaus.     
 
        
             
        
        
        
Answer:no
Explanation:
Because the other parts around it are sinking and it really isn’t