Final answer:
In the given analogy, the correct relationship is 'A. agriculture : droughts', as both scenarios depict a harmful environmental change affecting a part of the natural world: erosion on beaches and droughts in agriculture.
Step-by-step explanation:
The question presents an analogy that parallels how beaches are affected by erosion with another set of relationships. In the analogy "beaches : erosion :: A. agriculture : droughts B. atmosphere : rivers C. model : warming D. water : cooling", the proper analogous relationship would be 'A. agriculture : droughts'. Like erosion negatively impacts beaches by wearing away the land, droughts can negatively impact agriculture by causing water shortages that prevent crops from growing. Both scenarios present a harmful environmental change impacting a particular aspect of the natural world.
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