I'm pretty sure its c or d
        
             
        
        
        
<span>the function of the mucus blanket in the lungs is to filter and moisten the air.</span>
        
                    
             
        
        
        
is this coding app making or no
        
             
        
        
        
Water cycle
sun
never
evaporation
transpiration
condensation
precipation
run-off 
        
             
        
        
        
The answer to this is mechanic energy.