What is the primary function of a bus in a computer system?

The primary function of a bus in a computer system is to send and receive data. A bus serves as a communication pathway that connects various components of the computer, including the CPU, memory, and input/output devices. It carries data signals, control signals, and power between these components, facilitating the transfer of information. This data transfer is essential for the operation of the computer, allowing different parts to communicate effectively and work together to perform tasks.

Understanding the role of the bus is crucial as it underpins the overall functionality of the computer system. Other options highlight functions that are performed by different components; storage of long-term data pertains to hard drives and SSDs, managing power relates to power supply units, and displaying graphics involves graphics cards and monitors.