Bryce realized his mistakes through his growing guilt and the influence of his grandfather, who encouraged him to look deeper into Juli’s character. He saw how much effort and care Juli put into raising the chickens and providing him with eggs, which made him feel ashamed of his dismissive and dishonest behavior. To make up for his mistakes, Bryce started reevaluating his feelings for Juli and contemplating ways to show her he cared, including attempting to plant a sycamore tree to honor her love for nature.