What is a composition that is designed so that every element in the composition represents a single idea or theme?

A Abstract
B Allegory☺
C Chiaroscuro
D Mosaic

Am I Correct?

I think this is correct

Yes, you are correct! The composition that is designed so that every element represents a single idea or theme is called an allegory.

An allegory is a literary or artistic work that uses symbolic figures, actions, or objects to convey abstract ideas, moral principles, or universal truths. In an allegorical composition, each element - whether it's a character, object, or event - represents a specific concept or idea. These elements are often used metaphorically to provide deeper meaning and understanding to the audience.

For example, in the famous painting "The Birth of Venus" by Sandro Botticelli, the figure of Venus emerging from the sea is an allegorical representation of love and beauty. The composition uses various symbolic elements such as the sea, the shell, and the winds to convey this specific theme.

So, in this case, allegory (option B) is indeed the correct answer. Well done!

Again, have you looked these up? Have you double-checked your text?