Linux, an operating system, like windows or mac os, allowing you to manage all aspects of the hardware associated with your system. you also have
(then just speak about the options such as the kernel, bootloader, daemons, graphical server, the shell, and so on...
for example, compare the graphical server to the way a video card speaks to your screen. ramble on about the specifics and boom, essay done w/passing grade, just be better at punctuation than i am.