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If long-term change is seen in a region's climate, on what basis should it be studied?

Answer and explanation

Correct answer: On long-term temperature and rainfall data

A climate trend means a pattern of change that continues or appears over a long period. Since weather can vary naturally from one day to another, one unusual day cannot prove that a region’s climate has changed. Reliable study requires measurements collected repeatedly over many years. Temperature and rainfall records are especially useful because they allow scientists to compare averages, extremes, and patterns across different periods.

Option D is correct because long-term temperature and rainfall data provide measurable evidence for studying climate change. One day’s news or one hour’s temperature shows weather at a particular moment, not a dependable climate trend. People’s opinions may be valuable observations, but opinion alone is not sufficient scientific evidence. Therefore, long-term, systematic records are the appropriate basis for the study.

Related tags

ClimateClimate-DataLong-Term

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