Which of the following was NOT a function of Waru Waru?

(A) Keeping crops safe from animals (B) Retaining moisture for crops (C) Allowing for more efficient trade (D) Minimizing erosionExplanation: The Waru Waru was characterized by streams of water, which separated crops. Therefore, there was an ever-present water source, which eliminates (B). An added benefit was that it limited animal access to the crops, so eliminate (A). The elevated crop beds also limited the damage caused by erosion during floods, so eliminate (D). Choice (C) is correct.