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The rise in the earth's mean surface temperature between 1860 and the present is considered to be caused by I. release of methane from wetlands. II. deforestation. III. burning of fossil fuels. a) I and II only. b) I and III only. c) II and III only. d) I, II, and III.

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Final answer:

The rise in Earth's temperature is caused by the release of methane, deforestation, and the burning of fossil fuels, implicating all three factors (I, II, and III) in global warming. Therefore, the correct option is d).

Step-by-step explanation:

The rise in the Earth's mean surface temperature between 1860 and the present is attributed to several factors. Release of methane from wetlands, deforestation, and burning of fossil fuels all play a significant role in this increase. Methane is a potent greenhouse gas that is released from wetlands and thawing perma frost. Deforestation leads to a reduction in the number of trees that can absorb CO₂, which is another greenhouse gas. Lastly, the burning of fossil fuels such as coal, oil, and natural gas is the primary source of CO₂ emissions, contributing heavily to the enhanced greenhouse effect. Scientific consensus indicates that human activities, notably the three factors mentioned, are the main drivers of the current trend of global warming.

Therefore, the correct answer to the student's question would be d) I, II, and III.

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