Which term means a part of something that is different from others?

• A. Sector
• B. Security
• C. Series
• D. Sequence

Answer: (A)

Choosing a word that means a distinct part of a whole.

Sector is the best fit because it refers to a specific subdivision or portion that stands apart from the rest. In geometry, a sector is a wedge-shaped part of a circle, clearly a portion that is different from the other parts of the circle. More broadly, you can talk about sectors of an economy or areas within a larger system, all signifying a particular portion that’s distinct from the whole.

The other terms don’t convey that sense of a part of a larger whole. Security means safety or protection, not a subdivision. Series refers to a set of things that come one after another, and sequence emphasizes order or progression, not a specific portion of a larger thing.