Answer:
C.
Explanation:
Environmental Scientists use Global Positioning System (GPS) to track the movements of polar bears and other vulnerable populations.
A GPS, is a global satellite system which can be used to track an object or a person, to navigate, etc.
GPS has become an integral part of today's life and if one is lost, we can find them with them help of GPS in their mobile phones. In the same manner, the environmental scientists track polar bears or any other vulnerable animal with the help of GPS.
