The correct option is A Generalization to direct address.
Here the difference between 1-6 lines and the rest of the poem is noted when the first six lines of the poem addresses general 'he' while the rest of talks to a 'you', making it more personal. So, option A must be the answer. Option B cannot be the answer as there is no switch in tense and C is also not the answer as there is no change in attitude. There is also no extended simile nor is there a divine intervention. So, options D and E are out as well. A is our answer.