The correct answer is C. Compass.


- Compass:
- A compass is an instrument used for navigation and orientation that shows direction relative to the geographic cardinal directions (North, East, South, and West).

- Other Terms:
- Map: A representation of an area, showing geographical features, but not an instrument for finding direction.
- GPRS (General Packet Radio Service): A mobile data service used for transmitting data, not for navigation.
- Compound: This term does not relate to navigation. It usually refers to a combination of substances or a complex structure.


The correct answer is C. Compass.