Think of a five-level chain of reasons, and the inferences from one to another for each of the reasons in your essay.
When agreeing with the writer, write the five reasons in the following order (for each, describe how food can be found):
1. Economics
2. Engineering
3. Arts
4. Music
5. Morality
When differing in opinion from the writer, write the reasons in the following order:
1. Biology (as for agreeing with the writer, i.e. how food can be found, until Medicine, see below.)
2. Economics
3. Engineering
4. Medicine
5. Morality (how a person may enter into different circumstances, e.g. trip over).