Final answer:
The primary theme in Chaucer's Prologue from The Canterbury Tales is the exploration of human existence through a diverse group of characters.
Step-by-step explanation:
The primary theme in Chaucer's Prologue from The Canterbury Tales is the exploration of human existence through a diverse group of characters. Chaucer reveals this theme by depicting a wide range of individuals from different social classes and occupations, highlighting their unique personalities, flaws, and virtues. Through their interactions and stories, Chaucer offers a social commentary on various aspects of medieval society, including corruption, hypocrisy, and the pursuit of personal and spiritual fulfillment.