Final answer:
In Kauffman's painting, the key decision is the artist's values and judgments placed on the female body when selecting models to represent the ideal beauty of Helen of Troy.
Step-by-step explanation:
The key decision making by Kauffman in the painting Angelica Kauffman, Zeuxis Choosing his Models for his Painting of Helen of Troy, reflects a choice concerned with the values and judgments placed on the female body during the artistic process, as Zeuxis selects models to represent the ideal beauty for his depiction of Helen of Troy.
Kauffman's work often incorporated allegorical elements and attention to detail, as seen in her mastery of fabric painting. Her paintings not only depict physical forms with great care but also engage with themes of values and representation. The emphasis in her paintings on allegory and the idealization of the female form echoes the trend of the age, including Neoclassicism, which embraced classical ideals and subjects.