Final answer:
In a circuit, the light and motor are considered loads as they consume electric power and convert it to light and mechanical energy respectively. The switch is a control device and the battery is an energy source, not loads.
Step-by-step explanation:
In an electric circuit, the load can be any component or combination of components that consume electrical power when the circuit is complete. Among the options provided - a light, a switch, a motor, and a battery - the light and the motor are considered loads because they convert electrical energy into other forms of energy; the light converts it into light, and the motor into mechanical energy. Conversely, a switch is simply a control device that allows the circuit to be opened or closed, and a battery acts as a source of electrical energy, not a load.