Final answer:
Option (true), The secondary sector involves the transformation of raw materials into useful products through manufacturing.
Step-by-step explanation:
The statement is True. The secondary sector involves the transformation of raw materials into useful products through manufacturing. This sector includes industries that take materials extracted by workers in the primary sector, such as iron ore or crude oil, and manufacture them into finished goods like iron pipes or gasoline. Examples of secondary sector activities also include oil refining and food processing.