I’m not sure what there asking and how do I solve it and answer

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Work requires a force which causes: potential energy or motion