Some devices that depend on gravity to function include scales, showers, and satellites, to list a few.
Answer:
Choice B, "choose which goods and services to buy"
Explanation:
Consumers choose which goods and services to buy. Companies only want to provide goods and services they know will be bought. Therefore, consumers affect which goods and services are produced because they choose which goods and services to buy.
Operating System (OS) is the answer.
An application runs in/on an OS. It is not the OS itself. Like Word or Chrome are applications.
Systems is too generic and not specific enough to mean anything in this context. Throw away answer.
Network Operating System does not 'usually' run on a hard drive but on memory chips in things like routers, wireless access points and switches that move network traffic.