What can be the main difference between visual metaphor and symbol in art?

Metaphor creates meaning through comparison while symbol gives meaning through accepted sign

The governing concept is the difference between two meaning-making devices in visual communication. A visual metaphor invites the viewer to understand one thing through comparison with another; for example, a heavy chain may suggest emotional restriction even though it is not literally a feeling. A symbol is an image, object, colour, or sign that carries a meaning recognised through culture, convention, or repeated use, although symbols can also have personal meanings. Thus option A is correct. The distinction is not absolute, because a symbol may work metaphorically and a metaphor may become widely recognised. The other options deny meaning or incorrectly remove the visual basis of both devices.

This is a Class 9 Art Education question. Chapter: Visual Communication. Topic: Use of symbols.