Which component of the computer is responsible for coordinating memory?

The correct answer is the operating system, as it plays a crucial role in managing and coordinating memory in a computer system. The operating system is responsible for memory management, which includes keeping track of each byte in a computer's memory, allocating and deallocating memory space as needed, and ensuring that processes do not interfere with each other’s memory.

The operating system handles virtual memory, paging, and segmentation, all of which help optimize how memory is used, allowing multiple processes to run simultaneously without crashing each other or exceeding the available memory. This management ensures efficient and effective utilization of the system's resources.

The other components, while important to overall system functionality, do not coordinate memory in the same way as the operating system. The CPU executes instructions and processes data, but it relies on the operating system for memory management tasks. The graphics card is focused on rendering images and handling visual output, and the network interface is dedicated to connecting the computer to networks and transmitting data. All these roles are vital, but they do not involve the direct coordination and management of memory as performed by the operating system.