Geometry

Question Analysis
This question uses a diagram-based approach to identify a 3D shape.
The main focus is on visual recognition of a cone by observing the image's structural elements.

Key Concept Explanation
A cone in a diagram can be recognized by:
A single curved surface converging to a point (apex)
A circular base
One continuous surface from base to apex
The perpendicular height shown confirms the cone is right.

Step-by-Step Solution
The image shows a single apex above a circular base, with sides that smoothly slope from base to apex.
The vertical dashed line (height) and symmetry reinforce that this is a...