This is the model of a ball bearing, we are not able to see what is inside it, there surely are balls inside. And we'll probably be able to better understand this by using the BI framework. But here again it is confusing. So I'm going for a sectional view. I'm going to cut this part using some plane so that I can understand this figure. I'm going to inspect selecting section analysis.

Now you can see the sectional view I have selected one plane as my face using which I have cut this part. And now it is much clearer to me. Now except the ball if I select the other sketch and revolve it about an axis, I can get this ball bearing design easy. Now you can see that a new tab called analysis has been added to browser. When I expand it, I can see the section if I switch off the section. You can see That my regular design is coming back in this way we can have any number of sections along many other planes also.

So analysis is only a representation and not any design change. Our model remains unchanged