Name the following in the figure shown below: the base or bases, the part labeled pq, and the figure itself

Take a look at it.  We know it's a cone, right?  So that answers your 3rd question. The base (or the part that it sits on if you put it down), is a circle.  The other parts it can't sit on without rolling, so it has to be that circular side.  And if that's a circle, that means that any line from the center to the outside 'circumference' is the radius.  This means that the answer is A.

Magic man is here, but unfortunately he is broke won’t you him out