Question

Difficulty: MediumIdentification of Main Idea and Supporting Details

Read the passage below carefully:

In recent years, artisanal salt harvesting along the coastal lagoons of Benin Republic has undergone technical modernization. Historically, local harvesters relied exclusively on solar evaporation, a weather-dependent process yielding low seasonal quantities. Today, cooperative societies have introduced biomass-fueled boiling pans, allowing for year-round salt crystallization regardless of rainfall patterns. Additionally, harvesters utilize hydrometers to measure brine salinity accurately before processing. While these technological advancements have quadrupled annual production and boosted local household incomes, environmentalists warn that increased timber consumption for fuel is accelerating mangrove deforestation along the fragile coastal estuaries.

Match each excerpt or summary statement from the passage on the left with its correct structural role within the text on the right.

  • The technological modernization of artisanal salt harvesting in Benin has boosted production but generated ecological challenges.Central Main Idea
  • Cooperative societies introduced biomass-fueled boiling pans and hydrometers to enable year-round processing.Key Supporting Detail (Methodological Advancement)
  • Increased timber consumption for salt-boiling pans is accelerating coastal mangrove deforestation.Specific Supporting Detail (Negative Consequence)
  • Traditional harvesters formerly relied exclusively on solar evaporation, resulting in low seasonal yields.Background Contextual Detail (Historical Baseline)

Answer

The central main idea corresponds to the overall synthesis of modernization and its ecological impact; methodological advancement corresponds to the introduction of boiling pans and hydrometers; negative consequence corresponds to mangrove deforestation; and historical baseline corresponds to the traditional reliance on solar evaporation.
The correct alignment accurately distinguishes between the comprehensive thesis statement (the synthesis of production gains and ecological risks) and the supporting evidence functions (methodological tools, environmental consequences, and historical background).

Step-by-Step Solution

1
Analyze the passage structure and scope
Identified that the passage contrasts historical practices with modern innovations while introducing an overarching environmental trade-off.
Determining the author's overarching focus helps separate core thesis statements from subordinate evidence.
2
Evaluate the statement synthesizing modernization and ecological trade-offs
Matched to Central Main Idea.
A main idea must encompass the entire scope of the text rather than focusing on a single paragraph or sub-point.
3
Categorize remaining factual statements based on their specific functions
Matched technological tools to methodological advancement, mangrove loss to negative consequence, and past solar evaporation to historical baseline.
Supporting details reinforce the main idea by providing specific evidence, historical contrast, or concrete outcomes.

Key Concept

Distinguishing between the central thesis and supporting details (historical context, technical evidence, and specific consequences) in a reading passage.
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