Most people in Africa who farm or herd for a living do it at the subsistence level. This means that

This means that they maintain themselves at a minimum level that's enough for them to live by.

Explanation:

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answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

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answer; taking detailed notes during the interview;