Numerical answer
Four of the five sentences below, when arranged in the right order, form a coherent paragraph. Identify the one sentence that does NOT fit and key in its number as your answer.
1. The Amazon rainforest generates a substantial portion of its own rainfall through a process known as evapotranspiration, in which trees release water vapour that condenses and falls back as rain further inland.
2. This internal recycling means the forest partly sustains its own climate rather than depending solely on rainfall carried in from the ocean.
3. Large-scale deforestation disrupts this cycle, potentially reducing rainfall even in areas of the forest untouched by logging.
4. The Amazon river itself discharges more freshwater into the ocean than any other river system on Earth.
5. Some scientists warn that if deforestation crosses a critical threshold, parts of the rainforest could shift irreversibly toward a drier savanna-like ecosystem.
1. The Amazon rainforest generates a substantial portion of its own rainfall through a process known as evapotranspiration, in which trees release water vapour that condenses and falls back as rain further inland.
2. This internal recycling means the forest partly sustains its own climate rather than depending solely on rainfall carried in from the ocean.
3. Large-scale deforestation disrupts this cycle, potentially reducing rainfall even in areas of the forest untouched by logging.
4. The Amazon river itself discharges more freshwater into the ocean than any other river system on Earth.
5. Some scientists warn that if deforestation crosses a critical threshold, parts of the rainforest could shift irreversibly toward a drier savanna-like ecosystem.
Show answer and solution
Answer: 4
Sentences 1, 2, 3 and 5 form a coherent chain about the forest's self-sustaining rainfall cycle and the risk deforestation poses to it. Sentence 4, about the Amazon river's freshwater discharge into the ocean, is a stray fact about the river rather than the rainfall-recycling cycle, and breaks the paragraph's logical flow.
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