Which of the following is a meaning of the word sphere?

• A. A globe; a ball shaped object
• B. An area of knowledge, study or expertise
• C. A spherical shape in geometry
• D. A curved surface used in navigation

Answer: (A)

Sphere is a word with more than one meaning, but the everyday sense most people default to is a globe or ball-shaped object—something round in three dimensions that you can hold or see. This matches the option describing a globe or ball-shaped object perfectly, since many common items and planetary bodies are described as spherical.

In math, the term gets a bit more precise: a sphere is the surface consisting of all points at a fixed distance from a center, while the solid object people often call a ball is the enclosed volume. That distinction helps explain why a statement about a spherical shape in geometry is less natural for this question—the everyday, physical sense is the clearest and most familiar meaning.

The other senses exist, like a sphere of knowledge or influence, but they describe abstract domains rather than a physical object, which is why they don’t fit as the direct meaning in this context. The option about a curved surface used in navigation isn’t a standard meaning.