Correct Option (B)
The passage directly links the melting of summer ice in the Arctic to the increased accessibility of vast reserves of fossil fuels, fish, and minerals. This accessibility, coupled with the absence of a comprehensive legal regime akin to the Antarctic Treaty, prompts countries with Arctic coastlines to scramble for territorial claims. This competition for resources and strategic advantage fundamentally alters the geopolitical landscape, making changes in geopolitics the most important implication of the passage.
Incorrect Options:
Option (A): The passage states that "countries with Arctic coastline" are asserting claims. It does not provide any information to suggest that India, which does not possess an Arctic coastline, would have territorial claims or free access to these resources. This inference is not supported by the text.
Option (C): While the passage highlights the Arctic's "vast reserves" becoming accessible, it does not claim that these resources are sufficient to definitively solve the world's future problem of resource crunch. The passage focuses on the accessibility and the resulting competition, not on a global solution to resource scarcity.
Option (D): The passage contrasts the Arctic and Antarctica primarily in terms of their legal protection regimes and vulnerability to territorial claims. It does not offer a comparative assessment of the absolute quantity of resources present in the two regions. Therefore, this statement cannot be inferred from the provided text.