Final answer:
The use of symbolism in 'Neutral Tones' to convey the theme of emotional numbness and the decay of a relationship.
Step-by-step explanation:
In Thomas Hardy's poem 'Neutral Tones,' the theme of emotional numbness and the decay of a relationship is depicted through the use of symbolism.
One notable symbol in the poem is the image of the 'grayish stone' in stanza 3, which represents the cold and lifeless state of the narrator's emotions. This symbolizes the loss of warmth and passion in the relationship and reinforces the overall melancholic tone of the poem.