Question

9 what is a symbol? an abstract concept that symbolizes a concrete image a sign or sound that has meaning something concrete that represents something abstract something observed only with the mind

Explanation:

A symbol is a concrete object, action, or idea that represents an abstract concept. For example, a dove can symbolize peace (an abstract idea). The first option has it reversed (abstract symbolizing concrete). The second option is too broad as not all signs/sounds with meaning are symbols in the literary/semantic sense. The fourth option is incorrect as symbols are often observable (like a flag as a symbol).

Answer:

Something concrete that represents something abstract