Each economic sector plays a vital role in a nation’s economy. The word underlined in the sentence above is best defined as .
A.
decision
B.
activity
C.
dollar
D.
part

part

Explanation: An economic sector is a part of the economy, for example agriculture, fracking, etc. A sector is also a part of the economy, it is just a professional synonym. The answer is part.

answer; i believe that one of the correct answers is preventing human development;