Discussion

Explanation:

Option 1 is incorrect. The passage states that both snow depth of snow density matter. So the suggestion to use snow machines to ensure snow cover of at least eight inches is not something that the author is likely to do. Eliminate option 1. Option 2 is correct. The author discusses how climate change is the cause of adverse effects on the subnivium. Any action that helps to control climate change should therefore, be what he would most likely recommend. Among the given options, only option 2 suggests such a course of action. The others are both specific and not supported by the passage. Retain option 2.
Option 3 is incorrect. The author does not also suggest that there is a possibility of coping with climate change by taking any such action as addition of nutrients to the soil. Eliminate option 3.
Option 4 is incorrect. Planting more shrubs is not indicated as an action that will relieve the effects of climate change. Eliminate option 4.
Hence, the correct answer is option 2.

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