Q4.15. The following statements describe four distinct types of evidence that climate scientists have collected. Which one of these actually enables scientists to attribute recent changes in
Earth's climate to human activity?

From the evidence provided, recent changes in Earth's climate can be attributed to human activities based on the evidence that states that ; "GCM models can only reproduce temperature increases when anthropogenic green house gas emission are increased as forcing.

Hence, the most appropriate option is C.

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C

Explanation:

In this question, we want to select which of the options that correctly attributes recent changes in climate to human activities

The correct answer is that global climate models can only reproduce recent temperature increases when anthropogenic green house gas emissions are included as forcing

What we have here is that for the models to show a pattern of temperature increase that we have seen recently, there must be a substantial effort by humans to have increased green house gases emission as a direct result of their activities

So this clearly put in the pattern detection of temperature increase by the model as a result of human actions thereby directly attributing what the model has developed as a result of what men has put into action