Concept:Processing industries turn raw materials into semi-finished goods.
Explanation:The industry described performs two main tasks: extracting raw materials and converting them into semi-finished goods.
This is the exact role of a processing industry.
Processing adds value by refining or treating raw materials for further use.
Mining only involves extraction and does not cover the conversion stage.
Manufacturing mainly produces finished goods, not semi-finished goods.
Conversion is too broad and is not a standard industry name.
Therefore, the correct choice is processing.
Answer:C. processing