Final answer:
The author's purpose of the article is to inform readers about the cultural, economic, and religious significance of cattle in different societies, particularly referencing cultural anthropologist Marvin Harris' economic rationale.
Step-by-step explanation:
The author's purpose of the article "Loss of culturally cattle leave Dinka Adrift" seems to be primarily to inform. The content suggests a focus on explaining the cultural, economic, and religious significance of cattle within certain communities. Cultural anthropologist Marvin Harris is cited for his analysis of the economic rationale behind revering cattle, proposing that they offer more value alive than as just a source of meat. Additionally, the article sheds light on the cultural and religious importance of cattle among Indian people, beyond the economic perspective. Therefore, the author is not writing to entertain, persuade, or analyze, but instead aims to provide detailed information about an anthropological and societal topic, the relationship between humans and cattle, and its impact on cultural beliefs and practices.