During a solar eclipse, when the Moon's shadow falls on the Earth, we stand in the shadow rather than looking at it. Observers standing in the umbra see a total eclipse of the Sun, while observers under the penumbra see a partial eclipse.
 
        
             
        
        
        
Now-a-days, there are many softwares and application, which can help to keep track of your fitness. Motion analysis is referred to a technique that helps in tracking the record of the human movement patterns.
The softwares and the applications based on the technique of motion analysis are referred as motion analysis systems. These application track the physical activity performed by a person and also guide abut what a person should do to remain healthy.
 
        
             
        
        
        
Answer:
D, they are all the same size.