Brittany is working with the computer to analyze financial transactions, Craig is writing instructions for the computer, and Giselle is installing a second monitor to use with her computer. In this scenario, Giselle is working with the hardware component of an information system. Hardware refers to the physical components of a computer system that you can touch and see, such as monitors, keyboards, and hard drives.
By installing a second monitor, Giselle is directly interacting with a physical device that enhances the computer's functionality. The monitor is a piece of hardware that displays visual output from the computer, allowing Giselle to work more efficiently or view more information simultaneously.
Therefore, the correct component of an information system that Giselle is working with in this situation is Hardware.