Final answer:
When Leita, as a swan, rests her head against Mr. Peters' hand, it implies a goodbye gesture filled with gratitude or affection towards him for his role in her transformation.
Step-by-step explanation:
After Mr. Peters turns Leita back into a swan, the inference one can make when she rests her head against his hand before flying away is that she feels a sense of gratitude or affection towards him. This gesture suggests an emotional connection and a moment of farewell, indicating that Leita acknowledges Mr. Peters' role in her transformation and is saying goodbye in her own way.