Photosynthesis by producers right 
        
             
        
        
        
Answer:
 Multi-step process
Because it can be done twice or more
 
        
             
        
        
        
Plates include both oceanic crust and continental crust. Stable subduction zones involve the oceanic lithosphere of one plate sliding beneath the continental or oceanic lithosphere of another plate due to the higher density of the oceanic lithosphere.
        
             
        
        
        
Most fearures of the earth si terristrial, thick, out layer