polar bears roam the frozen wastes of the arctic, swimming miles between ice blocks as (a)(easy / easily) as they walk over the frozen snow. they prye on seals and walruses, which they catch when the unsuspecting animals are resting on the ice next to diving holes. for centuries polar bears ruled the north, (b) (feared / fearing) no other animals-until people arrived. modern hunters have greatly lowered the polar bear population. their home is no longer a safe refuge, as people hunt them from airplanes and helicopters, shooting them even when there is no place to land and claim the trophy. they leave the bodies to rot or (c) (eat / be eaten) by foxes or other animals.

정답이 easily, fearing, be eaten 맞나요?

또 이 문장 해석이 매끄럽지가 않은데, 해석 좀 부탁드려요 ㅠㅠ

their home is no longer a safe refuge, as people hunt them from airplanes and helicopters, shooting them even when there is no place to land and claim the trophy.