Geometry

Question Analysis
This question requires shape classification based on diagrams.
The main focus is identifying the sphere by analyzing its physical and geometric features in the options.

Key Concept Explanation
A sphere is a three-dimensional figure where:
All surface points are equidistant from the center
It has no flat surfaces, no edges, and no corners
Its curvature is uniform in all directions
Other shapes like cones, cylinders, and hemispheres have some curved and some flat parts, or distinct edges or vertices.

Step-by-Step Solution
Option A: Describes a cone — it has a flat base and a pointed vertex → eliminate
Option B: Describes a sphere — round, no edges or vertices, uniform curvature → correct
Option C: Describes a cylinder — has two flat circular bases...