Examine the graphic below.The words on the left correspond to the definitions on the right.Which definition is the best match for centrosphere?
The answer is "A". The center of the Earth.
I believe that the three levels are:
1) primary or extractive: getting the resources. this includes for example producing milk (milking cows)
2) secondary: manufacturing: packaging the milk and treating it
3) tertiary: providing a service, for example bringing the milk to people's home!
Answer: A.)
Explaination: its right ok