Question

Heat energy always flows from

a. larger objects to smaller objects.
b. heavier objects to lighter objects.
c. cooler objects to warmer objects.
d. warmer objects to cooler objects.

Answer 1

warmer - cooler same as how high pressures usually go to lower pressures if able to.

Answer 2

Heat always flows from warmer objects to cooler objects.
That's the reason why, if you want to cool your soda, you
drop an ice cube into it, and not a red hot iron horseshoe.