Answer :
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In the given text, the graphical element that most helps the reader understand the basic purpose of the "mask" is the **bolded words at the end of each line**. These bolded words emphasize specific qualities and identities that are hidden behind the metaphorical mask of the masquerade. By highlighting these traits, the author draws attention to the depth and complexity of the characters beyond what is visible on the surface.
The bolded words serve as clues for the reader to unravel the true nature of the individuals described in the text, revealing that they are not just what their outward appearance suggests. This graphical element enhances the understanding of the central theme of unmasking and revealing the hidden aspects of a person's identity.
In summary, the bolded words at the end of each line in the text play a significant role in conveying the message about the complexities concealed by the mask of the masquerade, thereby aiding the reader in grasping the essence of the "mask" metaphor.