Final answer:
In the book Gerald's Promise by Nikki Grimes, Gerald promises Angel a heartfelt, handwritten letter to express his feelings for Christmas.
Step-by-step explanation:
In Gerald's Promise by Nikki Grimes, Gerald promises Angel a heartfelt, handwritten letter to express his feelings for Christmas. The reason behind this promise is that Gerald wants to capture his true feelings for Angel in a meaningful and personal way. He believes that a letter is more heartfelt and genuine than material gifts like a new car, luxurious vacation, or diamond engagement ring.