The answer is (2). Heat always flows down the temperature gradient, from high temperature to low temperature. Therefore, since the person is the warmest, heat flows from the person to both the ice and the air. Additionally, since the air is warmer than the ice, heat flows from the air to the ice.
Overuse of the same chemicals can result in the pest becoming immune to the pesticides.
Because the cold could freeze them, and they could get hypothermia.
