A writer wants to use an active voice when t<span>he subject of the sentence performs the action expressed in the verb. like for the sentence:
</span><span>The boy hugged the dog.
</span>the bold words show the subject performing the action (the dog) and the individual being acted upon (the boy). This is an example of a sentence using the active voice.
The correct answer is D. however.
You want to show contrast between these two sentences, and the only word among these which can do that is <em>however. </em>The sentences are each other's opposites - even though there is an increase of eagles in the Southeast, there is still a decline in their numbers overall.
Its the last one because the question that they had asked is really in the story the second line at the top.