Answer:
C. Manufacturing,
Explanation:
If a certain business is involved in transforming raw material into another finished products, it will be considered as manufacturing.
Let's use Louis' job as an example.
If , his involvement is limited to growing wheat (plant) and selling those wheat. It would be considered a as agriculture.
But, he use that wheat as a raw material and transformed it into another finished product (flour). This why it's considered as a manufacture.