How does the fork in the road in "The Road Not Taken" relate to the poem's theme?

In Robert Frost's poem "The Road Not Taken," the fork in the road relates to the poem's theme because it causes the poet to forego one path, which becomes the road not taken. ... The poet comes to a fork in the road where he must decide to continue on one path or veer off in another direction.

Explanation:

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,

its english as a dog

explanation: