When a tongue touches a cold metal pole, heat transfers from the tongue to the cold metal pole, causing the tongue to feel cold. Therefore, the correct diagram would represent "Heat out of pole" indicating that heat is moving from the tongue into the pole, resulting in heat transfer from the warmer object (the tongue) to the colder one (the metal pole).
So, the correct answer is: Heat into pole (if it refers to heat entering the pole from the tongue).