Final answer:
The line from Hardy's poem that best represents his use of realism in poetry is "And view my wasting skin". It highlights the physical decay and mortality theme in a realistic and honest manner.
Step-by-step explanation:
The best line from "I Look into My Glass" that represents Hardy's use of realism in his poetry is "And view my wasting skin". This line portrays the physical deterioration of the speaker's body and captures the realistic and honest depiction of aging. It emphasizes the theme of mortality and reflects Hardy's ability to confront the harsh realities of life through his poetry.
Learn more about Realism in Hardy's poetry