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Difficulty: MediumIdentifying Main Ideas and Supporting Details

Read the following passage from a journalistic article:

In the dense rainforests of the Ecuadorian Amazon, where roads do not exist and rivers are the sole highways, a quiet revolution is taking place. Indigenous Achuar communities, in partnership with local engineers, have developed 'Kara Solar,' an initiative that introduces solar-powered canoes to navigate the river systems. Traditionally, these communities relied on gasoline-powered motors, which are not only expensive and difficult to transport to remote areas but also introduce noise and chemical pollution into pristine ecosystems. The solar canoes, equipped with photovoltaic roofs that charge onboard batteries, operate silently and with zero emissions. Beyond environmental protection, the project has significant social implications. It is entirely managed by the indigenous Achuar, fostering local autonomy and providing safe, reliable transport for schools, medical emergencies, and trade. While critics initially doubted the feasibility of solar energy in the cloudy, high-humidity environment of the rainforest, the technology has proven resilient, utilizing high-capacity battery systems that store enough power for several days of overcast weather. Ultimately, Kara Solar serves as a blueprint for sustainable development, proving that isolated communities can leapfrog traditional fossil-fuel dependence by adopting clean, community-controlled technologies.

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

  1. A
    The technology behind the project uses high-capacity battery systems that store enough power for several days of overcast weather.
  2. The initiative demonstrates how isolated indigenous communities can achieve sustainable development and autonomy through clean, locally managed technology.Answer
  3. C
    The project was primarily created to prove that solar energy is more efficient than building roads in the Ecuadorian Amazon.
  4. D
    Traditional gasoline motors will be completely banned by the Ecuadorian government due to their environmental impact.

Answer

The statement that the initiative demonstrates how isolated indigenous communities can achieve sustainable development and autonomy through clean, locally managed technology.
The correct option correctly identifies the main idea: the initiative serves as a model of sustainable development and community autonomy. The passage explicitly states that Kara Solar acts as a 'blueprint for sustainable development' and highlights the social implications of community management and clean energy.

Step-by-Step Solution

1
Analyze the passage to identify the central subject and theme.
The passage details the 'Kara Solar' initiative, which introduces solar-powered canoes managed by indigenous Achuar communities in the Amazon.
Establishing the core subject helps distinguish the main theme from secondary details.
2
Separate primary assertions from supporting details.
Specific facts such as battery storage capacity, transport challenges, and gasoline pollution are supporting details that reinforce the broader theme of sustainable community-led development.
This prevents selecting options that represent only a narrow piece of evidence rather than the central idea.
3
Evaluate the options to see which matches the overarching thesis of the passage.
The option focused on community autonomy and sustainable development encompasses the entire text's message, while the other options represent minor details or unsupported claims.
This confirms the correct option based directly on textual evidence.

Key Concept

Identifying Main Ideas and Supporting Details

Hints

1
Identify the sentence that describes what Kara Solar serves as a blueprint for, which usually signals the main idea.
Estimated Time:1m 30s
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Topics

Identifying Main Ideas and Supporting Details

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