Final answer:
Shakespeare's 'All the World's a Stage' is an extended metaphor because it continues this comparison throughout the monologue, detailing seven 'acts' or 'ages' of human life.
Step-by-step explanation:
The term EXTENDED metaphor refers to a metaphor that continues throughout a series of sentences in a paragraph or lines in a poem. In the famous speech 'All the World's a Stage' from Shakespeare's 'As You Like It', the entire world is compared to a stage and its inhabitants to the actors. The continuation and elaboration of this metaphor throughout the monologue, where Shakespeare detailed seven different 'acts' or 'ages' of human life, make it an extended metaphor.
Learn more about Extended Metaphor