Final answer:
Lina lives with her granny in 'City of Ember' due to the loss of her parents. Abner Snopes burns barns as an act of defiance in 'Barn Burning,' and the single grey hair in 'A Rose for Emily' implies that Emily was lying next to her dead suitor's corpse.
Step-by-step explanation:
In the novel City of Ember, Lina lives with her granny because her parents have passed away, leaving her grandmother as her only remaining caretaker. The description of the house that Lina lives in is not provided in detail within the questions asked, so I am unable to provide a description without more context or information about the book.
Regarding your other questions, they seem to refer to different literary works. For instance, Abner Snopes burns barns in William Faulkner's short story "Barn Burning" due to his resentment towards the wealthier class and to express his personal defiance.
The discovery of the single grey hair at the end of "A Rose for Emily," also by Faulkner, is significant as it suggests that Emily Grierson had been lying next to the corpse of her deceased suitor, indicating her inability to let go and her profound isolation.