Barnacles belong to phylum Crustacea.
        
             
        
        
        
That answer would be D.
Hope that helped :)
        
                    
             
        
        
        
<span>Mannitol reduces the intracranial hypertension in patients with head injury. this chemical which is a sugar- alcohol lowers the viscosity of the blood and thus reducing the blood volume. Head injury may lead to increased intracranial pressure and volume. It is also believed that mannitol acts by reducing brain water.</span>
        
             
        
        
        
Number 1 ,3 and 4 are the answers
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Interdependence. Animals in a food chain/web are dependent on eachother for survival or death