The answer is motif :) any reoccurring theme, pattern, idea, image etc. in a work applies to this.
for example, an artist that includes flowers in across all of their work (or a series of it) would be depicting a floral motif. I hope this helps!!
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I can't see the picture of the artwork so I can't really answer. Sorry :/
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wait did u post the pictures i cant see them, but ill give feedback for like no points lolz
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