Scientists found a patch of grass growing in Manyikeni that is the same species as the grass that grows near Great Zimbabwe--and only there. What does this discovery suggest to historians?

The discovery of a species of grass that grows only near the Great Zimbabwe suggests to the historians that Manyikeni was an outpost for trade between Great Zimbabwe and the port at Kilwa.

What is the significance of trade between Great Zimbabwe and Kilwa?

Great Zimbabwe, is a geographical diverse region, as a number of unique species of plants and other vegetation are found only in this region. This resulted in an invitation to the traders from Kilwa.

Hence, option A holds true regarding trade between Great Zimbabwe and Kilwa. The complete question has been attached for better reference.

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