Answer
it could be a few things like it could be what is happening in the back round or what the people in the painting are doing/expressions look like
Explanation:
i don't know if this helped but yeah
Some of the qualities of Mannerism that are reflected in Bronzino’s work were “elegance, style, and technical skill. also the Mannerists took a very different approach. the term “mannerism” was used to suggest a more formal, less passionate approach to painting, with a focus on technique and style”.