Final answer:
To complete the circuit and light the bulb, you need to connect a battery to the two wires.
Step-by-step explanation:
To complete the circuit and light the bulb, you need to connect an object that allows the current to flow from the positive terminal of the battery to one end of the bulb, and another object that connects the other end of the bulb to the negative terminal of the battery. Out of the options given, (A) battery is the correct choice as it can provide the necessary voltage and current to light the bulb.