first to get brainest but u have to be right how do global positioning systems use elevation points on earth’s system to find latitude and longitude a. by using signals from a network of satellites b. by using topographic maps c. by using satellite images d. by using photography

Its A.by using signals from a network of satellites

Global Positioning System: GPS

A GPS locates the real-time geographical location of a certain thing.
For example, your phone has a built-in GPS. It connects to satellites directly above you and around you, in order to correctly determine your location.

Satellites can determine your real-time location correctly, because several satellites are used.

Thus, the answer is:
A. By using signals from a network of satellites