What are the most likely reasons why farming came so late to sub-Saharan Africa?

Low resources. Late time. No reason to plant.

Explanation:

Domestication of wild grains. The wild grain was so little that no one would farm. They didn't have a lot; they had a few resources natural resources. Europeans also didn't arrive till 1500's so, the resources they needed were not there till the Europeans. The place/region is very tropical so they had some resources already for a reason not to farm. No point. That part of Africa had the best land to no make anymore plants.

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It depends on what you believe, if you’re christian that you would have been told that the first humans were created by god and that we’re all decedent's from adam and eve but scientist say otherwise