The Bears mostly suffer because of lack of food. Because the ice is melting, seals don't inhabit it anymore in high quantities and since seals are the primary food of polar bears, bears can't get food and can't get fat enough to survive the winter when they are sleeping so they have to resort to searching for other food. This resulted with the decrease in the number of polar bears over the years.
The correct answer for this question, given the answer choices provided would be:<span>the Korean War Communism spread when North Vietnam took over South Vietnam.</span>
