Something that stands for something else could be called a Word Bank:
captures, symbol, outlines, botany, waterways, zoology, psychology, and enveloped

Poussin was responsible for establishing what as a key component of 17th century french art

Ineed someone to describe what they mean in the instructions !

Which is the most challenging aspect of developing a screenplay? finding an original idea collaborating with a script doctor establishing the key elements of plot selling a finished screenplay