Fact 1: Powering an electrical device with a battery requires a path for electricity to flow through a closed circuit. Fact 2: Electrical engineers work on power plants, computers, and other electrical devices. Given the two facts above, a battery-powered computer requires a what for electricity to flow?

Choices: (1). direct energy (2). closed circuit (3). kinetic energy (4). broken circuit (5). open air (6). hydrogen and oxygen (7). heat energy (8). open circuit
The answer is:
(2).