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Difficulty: EasyExplicit Main Idea

Desiccant packs are essential for protecting sensitive electronic equipment from moisture damage during prolonged storage. When placed inside sealed transit containers, these silica-based packets continuously absorb ambient humidity from the trapped air. By maintaining a dry internal environment, they prevent corrosion on delicate circuit boards and inhibit fungal growth on wiring insulation. Many desiccant packets also include visual indicator beads that change color when saturated, signaling that the material must be reactivated or replaced.

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

  1. A
    Indicator beads inside desiccant packets change color when saturated with moisture.
  2. Desiccant packs play a vital role in safeguarding stored electronics from moisture-related degradation.Answer
  3. C
    All electronic equipment requires climate-controlled warehouse storage to prevent complete system failure.
  4. D
    Silica-based packets are primarily used to prevent fungal growth on wiring insulation.

Answer

Desiccant packs play a vital role in safeguarding stored electronics from moisture-related degradation.
The passage opens with the explicit topic sentence asserting that desiccant packs are essential for protecting sensitive electronic equipment from moisture damage during storage. Every subsequent sentence describes the specific mechanisms by which these packets control humidity and protect components, making the statement regarding their vital protective role the definitive main idea.

Step-by-Step Solution

1
Locate the explicit topic sentence in the paragraph.
The opening sentence directly states that desiccant packs are essential for protecting sensitive electronic equipment from moisture damage during storage.
Expository paragraphs frequently state their core thesis or main idea in the leading sentence.
2
Evaluate the subsequent sentences to ensure they serve as supporting details.
Sentences discussing humidity absorption, corrosion prevention, fungal inhibition, and color-changing indicator beads all provide specific examples of how the packets achieve moisture protection.
Confirming that all other sentences elaborate on the opening claim verifies that the opening sentence is the overarching main idea.
3
Match the core thesis to the option that accurately paraphrases it without altering scope.
The statement expressing that desiccant packs safeguard stored electronics from moisture-related degradation accurately reflects the primary claim.
The correct answer must represent the entire passage rather than an isolated detail or an unjustified generalization.

Key Concept

An explicit main idea is directly stated in a topic sentence within the text, usually at the beginning, middle, or end of the paragraph, and is supported by all surrounding details.
Estimated Time:45s
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Explicit Main Idea

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