Question

Difficulty: MediumIdentification of Main Idea and Supporting Details

Read the passage below carefully and answer the question that follows:

Along the shores of Lake Victoria, smallholder fish farmers have long grappled with post-harvest losses caused by inadequate refrigeration infrastructure and unreliable municipal power grids. Traditionally, fishermen were forced to sell their daily catch immediately to middle agents at severely depressed prices to prevent spoilage. Recently, community-managed solar-powered cold storage hubs have emerged across coastal landing sites, fundamentally altering this economic dynamic. These off-grid units utilize high-efficiency photovoltaic panels paired with thermal ice-battery storage to maintain sub-zero temperatures throughout the night without grid reliance. By extending the shelf life of tilapia and Nile perch from hours to several days, fishermen can now aggregate their yields and negotiate directly with urban wholesale distributors. Preliminary economic surveys indicate that participating cooperatives have seen net household incomes rise by over thirty percent within their first year of operation. Furthermore, the reduction in spoiled fish discarded along the shoreline has yielded tangible sanitation benefits for local fishing villages.

Which of the following statements best expresses the main idea of the passage?

  1. The adoption of community-managed solar cold storage hubs has improved the economic livelihoods of fish farmers by mitigating post-harvest losses.Answer
  2. B
    Off-grid refrigeration units utilize thermal ice-battery storage to maintain sub-zero temperatures overnight without grid reliance.
  3. C
    Government subsidies for photovoltaic panels have successfully eliminated rural poverty across East African fishing communities.
  4. D
    Local fishermen prefer selling their daily catch to middle agents because urban wholesale distributors demand lower prices.

Answer

The main idea of the passage is that community-managed solar cold storage hubs have enhanced the economic livelihoods of smallholder fish farmers along Lake Victoria by reducing post-harvest fish spoilage.
The primary thesis of the text centers on how solar-powered cold storage hubs solve the problem of fish spoilage and low sales prices, resulting in increased incomes and economic empowerment for smallholder farmers. The option stating that solar cold storage has improved economic livelihoods by mitigating post-harvest losses encapsulates this full narrative arc.

Step-by-Step Solution

1
Identify the central topic of the passage
The passage discusses the introduction of solar-powered cold storage hubs for fish farmers along Lake Victoria.
Determining the main topic provides the foundation for finding the author's primary argument.
2
Distinguish the core message from supporting details
The passage explains the problem (spoilage and low prices), the innovation (solar storage), and the overarching outcome (higher incomes and direct market access). Technical details about thermal ice-batteries serve only to support how the innovation functions.
Supporting details elaborate on mechanisms, while the main idea encapsulates the primary cause-and-effect relationship.
3
Select the option that encapsulates the overall purpose of the text
The statement highlighting economic improvement and mitigation of post-harvest losses covers the entire narrative scope of the passage.
The correct main idea must be broad enough to encompass the text's primary focus without focusing solely on minor facts or introducing outside assumptions.

Key Concept

Identifying the Main Idea vs. Supporting Details
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