Final answer:
The knight in "The Wife of Bath's Tale" loops back to the main idea by giving his wife the sovereignty to make her own choices, which transforms her into a beautiful young woman.
Step-by-step explanation:
At the end of "The Wife of Bath's Tale" in Chaucer's The Canterbury Tales, the knight gives the old woman, who he is forced to marry, what she most desires - the power to make her own choices and to have control over her husband. This ultimate act of granting sovereignty to the old woman transforms her into a young and beautiful lady. This conclusion loops back to the main idea of the story which revolves around what women most desire - to have sovereignty over their own lives.