Read this sentence from paragraph 11. “national parks clearly needed coordinated administration from professionals attuned to the special requirements of these preserves.” which text-based detail from the passage supports this statement?

Without having the passage, I can only help you to find it on your own.  While you read the entire passage, what detail are you reading that supports that national parks are in need of coordinated administration from professionals of the preserves?  You have only stated 'detail', so I am assuming they are only asking for one; therefore, you need to look for some type of factual statement to support the sentence.