The answer is: The economic principle of comparative advantage.
        
             
        
        
        
Answer:
granite and basalt
Explanation:
The crust is composed of two basic rock types granite and basalt. The continental crust is composed mostly of granite. The oceanic crust consists of a volcanic lava rock called basalt. Basaltic rocks of the ocean plates are much denser and heavier than the granitic rock of the continental plates
 
        
                    
             
        
        
        
Answer:
preoperational; concrete operations                  
Explanation:
Jean Piaget has given the theory of cognitive development in which he has mentioned four different stages including sensorimotor, preoperational, concrete operational, and formal operational.
Preoperational stage: This is the second stage in the cognitive development theory and starts from the age of two years and lasts through seven years of age in a child's stage. At this stage, a child is being engaged in manipulating symbols and symbolic play.
Concrete Operational Stage: This stage is the third stage and starts at seven years of age and lasts through eleven years of a child's life. In this stage, a child is engaged in using logical operations or thought and therefore the child can put logic only to physical objects.
       
 
        
             
        
        
        
<span>Hector is using physical violence to deliver his threat to the rival dealer. This may also be considered to be psychological violence as the threat and fear posed to the rival dealer allows Hector to gain control over him.</span>