سوال ۱۵ کنکور ارشد علوم کامپیوتر ۱۴۰۰

Cloze passage: "When it comes to visually identifying a work of art, there is no single set of values or aesthetic traits. A Baroque painting will not necessarily share much with a contemporary performance piece, but they are both considered art. Despite the seemingly indefinable nature of art, there have always existed certain formal guidelines for its aesthetic judgment and analysis. Formalism is a concept in art theory in which an artwork's artistic value is determined solely by its form, or the way it is made. Formalism evaluates artworks on a purely visual level, (15) ---------- medium and compositional elements as opposed to any reference to realism, context, or content."

Which choice best fills blank (15)?