In which sentence is the underlined group of words a prepositional phrase acting as an adverb?

1.the hosts on two opposing mountains stood,  

2.thick as the foliage of the waving wood;  

3.between them an extensive valley lay,  

4.o'er which the gleaming armour pour'd the day,  

5.when from the camp of the philistine foes,

6. dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,

the correct answer is:   [d]:   " espionage " .

hope this is to you!

    best wishes in your academic endeavors —

          and within the community!

it u understand what he thought at the time and let u know more about him then what third person would of known probably. hope this : )