Which of the following is true about the expansion bus?

The expansion bus serves a crucial role in computer architecture by facilitating communication between the CPU and peripheral devices. It acts as a pathway that allows the CPU to send and receive data to and from various hardware components, such as graphics cards, sound cards, and network interfaces. This interaction is essential for enhancing the system's capabilities and ensuring that all parts of the computer can work in harmony.

The expansion bus supports the addition of various expansion cards, enabling the seamless integration of additional features or processing power into the computer system. This dynamic connection helps maintain efficient and effective communication between the CPU and the installed peripherals, which is vital for overall system performance.

In contrast, options suggesting the bus connects the power supply to the motherboard or that it is primarily used for data storage are inaccurate, as these functions are not the primary roles of the expansion bus. Likewise, while there may be interaction between the expansion bus and memory, it is not specifically used for the installation of additional RAM. Thus, the focus of the expansion bus is mainly on enabling peripheral communication, making the correct possibility all the more significant in understanding computer components and their functions.