Explanation:
Work done is a physical quantity that is defined as the force applied to move a body through a particular distance. 
Work is only done when the force applied moves a body through a distance. 
     Work done  = Force x distance
The maximum work is done when the force is parallel to the distance direction. 
The minimum work is done when the force is at an angle of 90° to the distance direction. 
  So to solve this problem; 
  multiply the force applied by Zack and distance through which the bull was pulled. 
 
        
             
        
        
        
I’m pretty sure it’s, B. An Electric Motor. I apologize in advance if it’s incorrect.
        
                    
             
        
        
        
B. Extra text to get to 20 characters.
        
             
        
        
        
The cyclist who travels 20 kilometers per hour for 15 kilometers
        
             
        
        
        
Heat rises, and it is warmer at the equator, so I think warm air would rise at the equator and move towards the cooler poles.