Answer:
All three share feelings of sadness and loss.
Step-by-step explanation:
The three poems, Emily Bronte's "Remembrance", and Thomas Hardy's "Ah, Are You Digging On My Grave?" and "The Darkling Thrust" all deals with the theme of loss and death, gloomy and sad feelings.
Emily Bronte's poem is about a woman who's mourning the death of her lover and the reflections of this death that has impacted her.
Thomas Hardy's "Ah, Are You Digging on My Grave?" is from the perspective of the dead person whose grave was disturbed by a dog.
Again, "The Darkling Thrust" deals with the speaker talking of the world dying and how he is unhappy with the replacement with the new one.
All three poems all have the similar themes of death, the loss of life, the change and the sadness of the characters.