Why is an aardvark a good metaphor for the activities of a farmer? What might be the purpose of combining several animal features?

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It is likely that the author of the text has many characteristics of animals, to establish a connection between the farmer and life in nature, showing him as a composing element of nature that is able to survive through it, as well as animals. Comparing the farmer with an aardvark, shows how the farmer, like this animal, manages to survive arid and dry environments, treating the land appropriately to be productive and eliminating pests that can harm it.