Mango Farmer Summary: Main Idea vs. Detail
Read the following summary of a passage that appears in the exam. The passage describes a mango farmer in Miyazaki Prefecture. In 2018, a typhoon damaged 40% of his open-field trees on his 1.2-hectare farm. He borrowed money to build two greenhouses and now produces 30% fewer mangoes by weight, but each fruit is larger and sells for about 2.5 times the open-field price. He has hired three part-time university students to handle online orders. The passage ends with the farmer saying, 'I did not choose greenhouses because they are easy. I chose them because they let me decide when to take a risk.' A student's notes list three possible main ideas: (A) typhoons are the biggest problem for Miyazaki farmers; (B) the farmer changed his method to gain control over quality and market timing; (C) university students are essential to modern agriculture. The student also marks the sentence about 30% fewer mangoes as a detail.
1. Which of the three notes (A, B, or C) is the best main idea? Explain why the other two are too broad or too narrow.
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Best: B. The passage follows one decision: after typhoon damage, the farmer moves from open fields to greenhouses. The closing quotation explains the purpose of that change-not ease, but control over when to take a risk. Control over quality and market timing fits the details: fewer but larger fruit, a higher price, and online orders. A is too broad because the passage mentions one typhoon in 2018, not the general claim that typhoons are the biggest problem for all Miyazaki farmers; a main idea must cover the whole passage, not just its opening cause. C is too narrow and distorted: the three students appear in one sentence about online orders, and the passage does not argue that students are essential to modern agriculture. A good main idea explains why the details are included. Here the details about yield, price, and hiring all support the farmer's strategy of managing risk and market timing.
2. What can be inferred about the farmer's attitude toward risk from the final quotation? Use the quotation and at least one other detail.
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The farmer does not see risk as something to avoid completely. He says he did not choose greenhouses because they are easy; he chose them because they let him decide when to take a risk. This implies he prefers a calculated risk over an uncontrolled one. The detail that he borrowed money to build two greenhouses shows he was willing to take on debt. The 30% lower yield but 2.5 times higher price suggests he accepted lower volume in exchange for greater control over quality and price. The inference is that he is cautious but proactive-he wants to choose the moment and terms of risk rather than have a typhoon choose for him.
3. The student thinks the 30% detail is the main idea because it contains a number. Explain how the detail functions in the passage.
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The 30% figure is supporting evidence, not the main idea. It measures the cost of the farmer's strategy: he produces less by weight. Its function is to make the trade-off concrete and to set up the contrast with larger fruit and 2.5 times the price. Without the 30% detail, the main idea-that he gained control over quality and timing-would be an unsupported claim. A main idea is the central point that the details serve; a number can be memorable, but memorability is not the same as centrality. If the passage were mainly about declining yields, the 30% figure would be central; here it is one piece of evidence in a passage about a strategic change.