Why do you think zero said that he liked to dig holes?

Zero said he liked to dig holes as a way to express his connection to the physical labor at Camp Green Lake, where digging holes is a punishment disguised as a character-building exercise. Additionally, digging serves as a means for him to find a sense of purpose and escape from his troubled past. This statement reflects his desire for simplicity and the therapeutic nature of the repetitive task, allowing him to reflect on his life and experiences.