Question

which of these actions would decrease heat transfer between two objects? increasing the temperature of the warmer object increasing the area of their contact reducing the thermal energy of the cooler object reducing the time of their contact

Explanation:

Heat transfer is proportional to temperature difference, contact area and time. Reducing time of contact decreases heat - transfer opportunity. Increasing warmer object's temperature or reducing cooler object's thermal energy increases temperature difference, enhancing heat transfer. Increasing contact area also increases heat transfer.

Answer:

reducing the time of their contact