please help

As the heavier bucket moves downward to the ground, which of the quantities in the list below will have been conserved? Sort the quantities into the Conserved or Not Conserved bins. Sort the quantities in the list into the Conserved or Not Conserved bins. Reset Help mechanical energy of the system of mechanical energy of the system of mechanical energy of the system of the lighter bucket and the Earth the heavier bucket and the Earth the two buckets, the rope, the pulley, and the Earth Conserved Not Conserved