Final answer:
In Peircean semiotics, 'evening gowns' does not act as a signifier in an image context without specific visual details; whereas, 'red dresses', 'posture', and 'jewelry' can be interpreted as signifiers.
Step-by-step explanation:
In Peircean semiotics, a signifier is anything that stands in for something else. In the context of the question regarding the signs in an image of women wearing red dresses, we can identify several potential signifiers. The dresses' color being red (red dresses), the women's posture with hands at sides (posture), and the women's shiny jewelry are all elements that act as signifiers. They carry cultural or social meanings and can be interpreted in various ways, depending on the context and the observer's experiences. However, the choice 'evening gowns' is a tricky part of the given options. While 'evening gowns' refers to a specific type of dress which could carry its own connotations, the mere concept or term 'evening gowns' without seeing the specific dresses in the image does not act as a signifier by itself in this context. Therefore, the correct answer to the question is 'evening gowns' as it does not act as a signifier in the image of women wearing red dresses.