Read the passage and choose the most precise word for the blank. "Scientists studying the Great Barrier Reef have documented a _______ decline in coral cover over the past three decades, attributing it primarily to rising sea temperatures and ocean acidification." Which word best fills the blank?
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Worked Solution
Step 1: Context — scientists documented the decline over three decades, attributed to climate factors.
Step 2: A decline serious enough to study over 30 years and attribute to major causes (rising temperatures, acidification) is significant in scale.
Step 3: "Significant" means important and considerable in size or effect — it correctly describes the scale of the documented decline.
Answer: significant
Correct answer: significant
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