What is the greatest contributing factor in the loss of polar bears in arctic areas?

Matthew decided he wanted to hike up mount everest. on his way to the top, it began to snow and the temperature dropped to -10°f. matthew forgot to wear a heavy jacket so his body began to shiver beyond control. in this case, matthew's body shivering is the to a drop in temperature. * 0 points reflex stimuli responce environmental facto

Types of scientific inquiry that biologist engage in that cannot be completely controlled

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks