The correct response is:
Heat is transferred from the air to the ice cream.
or
Thermal energy is transferred from the air to the ice cream, warming the ice cream.
Both these options accurately describe what happens when the ice cream is left in a warm room; it absorbs heat from the warmer air, causing it to melt. The other option about transferring thermal energy from the ice cream to the air is incorrect in this scenario, as the ice cream is warming up rather than cooling the air. Potential energy is not relevant in this context.