帮我分析下这个句子! 谢谢This development has enthroned the South as Ame

帮我分析下这个句子! 谢谢
This development has enthroned the South as America's most densely populated region for the first time in the history of the nation'head counting.
as 在句中的成分?怎么翻译as和这个句子? 谢谢········
This development has enthroned the South as region