Final answer:
The words 'dolls' and 'gowns' best assist in comprehending the use of 'bonnets', as they describe the Sisters of Charity's attire and suggest a traditional, formal style.
Step-by-step explanation:
The words that best help the reader understand the use of the word 'bonnets' in paragraph 1 are 'dolls' and 'gowns'. These words describe the Sisters of Charity and provide context to imagine the type of bonnets being referred to. The phrase 'like dolls in mourning' helps readers visualize the nuns in their traditional, somber attire, which includes the distinctive bonnets. Similarly, the word 'gowns' emphasizes the formal and old-fashioned aspect of their clothing, suggesting a style that is not current but is fitting for their role.