Final answer:
The quote "all that glitters is gold" is an example of an idiom.
Step-by-step explanation:
The given quote is an idiom, which is a figure of speech whose meaning is different from the literal interpretation of its words. In this case, the idiom "all that glitters is gold" suggests that appearances can be deceiving, emphasizing the idea that not everything that looks valuable or attractive is necessarily so. The correct identification of this phrase as an idiom reflects an understanding of figurative language and the nuanced meanings embedded in expressions beyond their literal sense.
Idioms are an essential aspect of language, contributing to the richness and depth of communication. Recognizing and interpreting idioms enhances language comprehension, allowing individuals to grasp the intended meaning within various contexts.