Concept:Occupations that turn raw materials into finished products belong to the manufacturing class of occupations.
Explanation:Manufacturing occupations involve changing raw materials into usable finished products through processing, assembly, or fabrication.
For example, turning wood into furniture or cotton into cloth is a manufacturing activity.
Commercial occupations deal mainly with buying, selling, and distributing goods rather than producing them.
Extractive occupations involve taking natural resources directly from the land, water, or air.
Constructive occupations are concerned with building structures such as roads, houses, and bridges.
The activity described in the question is specifically about converting materials into finished goods.
Therefore, it belongs to manufacturing occupation.
Answer:D. manufacturing