What is the correct label for the ones in the photo that are not answered? There is one that was not labeled correctly, what is the correct label?

Which element would mostly likely have an electron affinity measuring closest to zero

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d