Which of the following describes a decrease in a system's entropy? OA. Water freezes to form ice cubes.
OB. A heat pump heats a home in winter.
OC. Heat travels to a pan from a stove top.
OD. Ice melts when placed near a fire.

Explanation:

A is the right answer, because when forming ice cubes the water molecules get much more organized and structured than before.

so, the entropy decreases.

in all the other options things get more distributed, so the entropy increases.

not completely sure but i think it’s many moons, smaller in size and a ring system.