Read this table of contents. contentsis a coral reef? fragile posed to fish concerns great danger taken can you do? ? based on information found in this table of contents, what is the subject of this book?

The knights of the round table were bound by the code of chivalry that called for loyalty to king, god, and lady.  in which set of lines from  sir gawain and the green knight  does sir gawain describe upholding this code?