“NPOs must act as watchdogs and ensure that the institutions they helped to build continue to serve all South Africans.” The NPO has taken on a position where it often supports weak or failing government services, and this makes it an essential tool for the continued growth of the country socially and economically.
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Answer: He equated the fence with civilization.
Explanation: On his journey through the Black Belt of Dougherty County, Du Bois exposes his fascination with fences? On several occasions he notes the presence or absence of fences because Du Bois equated the fence with civilization. "When one sees a vine clinging to a little porch, and home-like windows peeping over fences. a touch of culture."
This is referred to as the agricultural revolution - option d. It allowed the people to plant their own food (rather than collect) and gave them more security in life. (they could plan ahead and collect food for later).