The evidence from the image that supports the thesis statement of "imperialism involved extraction of raw materials" is that "the picture showed that gold was extracted from Africa to Europe, and the USA and Canada."
This is evident as the image was titled Gold Diggers.
From the image, the map of Africa was extensively excavated, and the gold extracted was deposited on the map of Western Europe, the USA, and Canada.
This implies that the imperialism relationships between the United States, Canada, and Western Europe with Africa involved extracting raw materials, which is gold, from Africa.
Hence, in this case, it is concluded that the image provided in the question supported the thesis that imperialism involved the extraction of raw materials.
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