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.
A sentence must contain both a subject and verb.
"Waiting for hours" is a gerund phrase which could be used as a subject, and "to see you" is an infinitive phrase. But both of these cannot be used as a verb in this context.
Since there is no verb, it cannot be a sentence and must be a fragment.
a) The author asked Johnson the reason for him being so sad.
b) Johnson replied that he was sad because they killed one of Johnson's three friend.
Explanation:
The above question includes a conversation between the author and Johnson.
The conversation goes like,
Author: Why are you so sad ?
Johnson: They have killed one of my three friends.
From the above conversation we can clearly understand that Johnson was sad because one of his three friend was killed and now with this understanding we can answer the following.
a)what did author asked to Johnson?
The author asked Johnson the reason for him being so sad.
b) what was Johnson's reply?
Johnson replied that he was sad because they killed one of Johnson's three friend.
