Which of the following best describes multitasking in computing?

Multitasking in computing refers to the ability of a computer to run multiple programs or tasks simultaneously. This capability allows users to switch between different applications without needing to close any of them, enabling a more efficient workflow.

When a system is multitasking, it divides its processing resources among the various active programs, allowing them to operate concurrently. This is essential in modern operating systems, where users often need to run several applications—like a web browser, word processor, and media player—at once.

In contrast, the other options do not accurately capture the essence of multitasking. Sequential processing indicates performing tasks one after another, which is the opposite of multitasking. Memory expansion refers to increasing a computer's memory capacity, and graphics rendering pertains specifically to creating images from 3D models; neither of these concepts aligns with the idea of executing multiple tasks at the same time. Therefore, running multiple programs best embodies the multitasking principle in computing.