Final answer:
The narrator of the passage is one of Mamma's children who refers to themselves as Pearl, making the correct answer d. Pearl.
Step-by-step explanation:
The passage provided is a first-person narrative, as indicated by the use of I statements, such as "I patted her hot hand," and "It's Pearl. Can you hear me?"
Given this information, the narrator in the passage is referring to themselves and expressing a personal connection with Mamma, indicating that the narrator is one of her children.
Additionally, the narrator directly names themselves when trying to get Mamma's attention - "It's Pearl." Hence, the correct answer to the question "Who is the narrator?" is: d. Pearl.