Answer:
B.
Explanation:
most valleys are weathered by running water. Glacier can also weather these. Because of running water it will carry the weathered pieces away.
Have a nice day and give brainliest! :)
 
        
             
        
        
        
<span>Particularly the skeletal muscles at rest
gain most of their energy from the aerobic respiration of fatty acids. Hence
fatty acids provide the majority of the energy for muscle metabolism when a
person is exercising at 25% of VO2max. However, the motor neuron is at rest
when a neuron is not receiving any input there will be a potential difference.
Thus, the potential difference measured when the neuron is inactive and it is
caled the resting membrane potential. </span>
 
        
             
        
        
        
Insertion mutation takes the T out and replaces it with an A. 
        
                    
             
        
        
        
Gas molecules across the membrane
It can be water molecules as well