Answer:
'The first level that agricultural businesses engage in is primary or extractive. Which is getting the resources, for example producing milk (or milking cows). The second level is called secondary. Which is manufacturing, for example packaging the milk and treating it. Lastly, the third level is, tertiary. Which is providing a service, for example bringing the milk to people's home.'
Step-by-step explanation:
(Paraphrased answer from WorldCitizen so it is in complete sentences.)