Your prepositional phrase is "around the park". Your preposition is around the is your modifier and park is your noun
My mother preceded my father in death.
We withstood the tornado by hiding in the cellar.
Answer:
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I would personally recommend the Ben Carson interview simply because it is constantly updated unlike the Encyclopedia Britannica.
Also, taking into consideration the fact that the main focus should be learning about a modern hero is important to highlight the fact that The Encyclopedia provides facts and general information regarding past heroes and despite Carson's controversial opinions he has had plenty of experience interviewing modern day heroes therefore I consider he would be a great resource.
Hope this helps!