The correct option is B.
High use of fossil fuels has increased the amount of greenhouse gas in the atmosphere which traps more heat raising the temperature to an unfavorable heat for polar bears.
How are polar bears affected by pollution?
As top predators, polar bears are exposed to high levels of pollutants through their food. The popular image of polar bears living in a pure, frozen wilderness is misleading. The Arctic food chain contains high levels of toxic chemicals.
What problems are polar bears facing?
Climate change is melting and fragmenting sea ice across the Arctic, forcing more pregnant females to make their dens on land instead. In addition, new oil and gas exploration and drilling threaten vulnerable polar bear populations.
Learn more about the problems faced by polar bears here https://brainly.com/question/13495024
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