Answer:
By conduction from your hand to the glass
Step-by-step explanation:
Conduction is the method of energy transfer between two objects that are in direct contact with each other and have temperature difference. here, energy transfer occurs from warmer to the cooler object.
In the given condition, hand and glass of ice water are in direct contact with each other. The hand is warmer while the glass of ice water is cooler. Hence, energy will flow from hand to the glass through conduction.