Which of the following best defines sector?

• A. A division of a society or an economy
• B. A part of something that is different from others
• C. A period of approximately eight hours during which workers perform their jobs
• D. Tranquil, peaceful or calm

Answer: (A)

Sector means a distinct part or division of a larger system, especially in economic or social contexts. This use captures how an economy or society is organized into different areas that contribute to the whole, such as sectors like agriculture, manufacturing, or services. So the best choice defines sector as a division of a society or economy, reflecting that sense of an organized, functional part within a larger whole. The other options point to different words or senses—such as a work shift, a calm state, or a generic part that’s simply different from others—without aligning with the common economic or social usage of the term.