Read the following sentence from the passage:
“To say the truth, there was much need of professional assistance, not merely for Hester herself, but still more urgently for the child; who, drawing its sustenance from the maternal bosom, seemed to have drank in with it all the turmoil, the anguish, and despair, which pervaded the mother’s system.” The description of the baby’s illness enhances the story by:
Explaining the medical condition of the baby was tied to the mother’s nervous state.
The sentence from the passage enhances the story by connecting the mother’s agitated state to the baby’s illness. Whether you believe that is scientifically possible or not is not important. Remember, in a passage from an older work, like this one, you will not always find modern ideas.