Artificial resources renewable only hard to acquire
Do you want to know the name of the trade route? I'll answer if that's what you want. :)
<span>Chad is 900 miles west of Khartoum Sudan.
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<span>Millet is grown in the Sahel because it is one of the main staples of the people there. It is considered as a vital source of staples. It is also, happened when it is grown with cowpea and sorghum. Fortunately, the risk of complete crop failure decreased.</span>
You forgot the options, but I can give you some examples, maybe this will help:
A distribution map will show you where and how much of a certain thing is happening. for example:
the percentage of literate or illiterate people in the different places
some characteristics, for example the average age, or average income for people in a certain area - here you would give a different colour for the different age or income groups.