Concept:Production is classified into stages. The extractive sector supplies raw materials, which belong to primary production.
Explanation:Resources such as crude oil, timber, and minerals are obtained directly from nature by the extractive sector.
At this stage, they are still raw materials and not finished goods.
Primary production is the stage that extracts these raw materials for industrial use.
Secondary production begins only later, when these materials are actually turned into finished products.
Therefore, the resources themselves are outputs of the primary or extractive stage, even though they may later be transformed in manufacturing.
Answer:A. primary production