Which of the following methods can help prevent heat loss from a hypothermic diver?

The method that aids in preventing heat loss from a hypothermic diver is removing wet items. When a diver is experiencing hypothermia, wet clothing can significantly contribute to heat loss because water conducts heat away from the body much more efficiently than air does. By removing these wet items, the diver's body can conserve heat more effectively and is also more amenable to re-warming techniques, such as covering with dry clothing or blankets. This is crucial in managing hypothermia since the primary concern is to retain as much body heat as possible while providing the necessary care.

In contrast, administering cold clear liquids or placing the diver back in the water would not assist in heat retention and could exacerbate the hypothermia. Similarly, covering the diver in a wet towel would also lead to further heat loss, as the wet material would continue to extract heat from the body, increasing the risk of deteriorating the diver's condition.