what are the answer choices?
 
        
             
        
        
        
Answer:
 By plotting the locations of earthquakes
Explanation:
When plotting the locations of earthquakes, scientists have been able to locate plate boundaries and also be able to determine plate characteristics and predict the movement of plates
 
        
             
        
        
        
Explanation:
Given that,
A girl pushes her little brother on his sled with a force of 200. N for 850. m
We need to find the work done by the force of friction acting on the sled. The force of friction is 200 N
Net force = 200 N - 200 N = 0
Work done = 0 
If force of friction is 300 N.
Net force = 300 N - 200 N = 100 N
The work done by a force is given by :
W = Fd
Put values,
W = 100 × 850 
W = 85000 J
Hence, this is the required solution.
 
        
             
        
        
        
Thats correct. And i also think that half of your paragraph was wrongfully cut off.