Answer:
all above
Explanation:
 friction is necessary to live 
 
        
             
        
        
        
Answer:
C- An explanation for why matter cannot be created or destroyed
Explanation:
 
        
                    
             
        
        
        
Answer:
Both technicians A and B
Explanation:
Both trailer sway control, hill assist and hill descent controls are additional featires that enhance stability of electronics and their control systems. Majorly, these features track and reduce skidding in electronics, therfore, enhancing electronic system stability. During the process, these newly added features help to automatically apply brakes and direct the sytem where the controller wants to take it.
 
        
             
        
        
        
Answer:
A. The athlete isn’t doing any work because he doesn’t move the weight.
Explanation:
We must remember the definition of work, which says that work is equal to the product of mass by the distance displaced. In this case, the athlete only does work when he lifts the weight from the ground to the point where he holds the weight suspended.
So when he's holding the weight, he doesn't do any work.
 
        
             
        
        
        
The ones that interact would be Atmosphere, biosphere, and cryosphere. :)