Concept:Subsistence agriculture produces mainly for the farmer’s own family using small plots, little capital, and basic tools.
Explanation:Little capital is used because the farmer relies on simple, cheap implements.
Small allotments of land are cultivated, usually with family labour.
Farm produce may be processed at home for household use, so processing raw materials can be seen in subsistence farming.
However, crude oil is an industrial petroleum product, not an agricultural input.
Subsistence farmers use crude tools such as hoes and machetes, not crude oil.
Therefore, the use of crude oil is not a feature of subsistence agriculture.
Answer:D. use of crude oil