Answer:
The length of time for the processes of weathering and erosion to occur are very long, however some quick. 
Depending on the force, erosion can happen quickly or take thousands of years. 
However weathering usually takes a long time. 
 
        
                    
             
        
        
        
Answer:
I think it's an example of equilibrium 
 
        
             
        
        
        
Answer: C. Preying 
Explanation:
A non-native species is the species which is introduced to a new ecosystem. This species is introduced intentionally or accidentally to a new ecosystem by human beings or they may enter to the ecosystem by their own.
A non-native species can be invasive which means it can compete with the native species for resources like shelter, food and mates.
According to the given situation, the Gila trouts being the native species has been affected by the non-native Rainbow trout. This may be because of the fact that non-native species can be invasive for the native species. As the species is used as mate by the non-native species and they may become the prey of non-native species. This has resulted in the extinction of the species of Gila trouts.  
 
        
             
        
        
        
Hey can u break it down and give me some more info on the exact thing u have t right about i will do it for you...:)