How does roosevelt develop the concept of preservation from modern life throughout his yellowstone speech?

IVE BEEN TO YELLOWSTONE!!!

Can you please explain more on this question btw so that i can answer it better than better :)

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,

omg omg omg that looks so so

explanation:

so cut i love it x3