Explanation:

- Option 1: Link Wire

- Typically refers to a single wire used to connect simple circuits or components.

- Not used to describe a collection of wires that connects various devices.

- Option 2: Bus

- Correct Answer

- A bus is a system within a computer or device, consisting of set wires, that transmits data, addresses, and control signals between components.

- Used for connecting internal components like CPUs, memory, and peripherals.

- Option 3: Bidirectional Wire

- Indicates a wire capable of carrying signals in both directions.

- Does not imply a collection of wires or multiple connections.

- Option 4: Cable

- Refers to an insulated collection of wires or fibers bundled together.

- Commonly used for external connections, not specifically for internal component buses.