Final answer:
In 'Swing' by Kwame Alexander, Floyd's response to his description of Sam is not detailed, so the correct answer is that the response is not mentioned.
Step-by-step explanation:
In the book Swing by Kwame Alexander, Floyd's response to the description of Sam is not explicitly mentioned in the text. Therefore, the answer to how Floyd responds to his description of Sam is C. The response is not mentioned. When a specific reaction or emotion is not detailed in a text, readers are often left to infer how a character may feel or react based on the context or other character interactions described in the book.