What is an example of onomatopoeia in the book holes?

In the book "Holes" by Louis Sachar, an example of onomatopoeia is the Word "crunch" used to describe the sound of the boys' feet on the dry, cracked ground. This Word vividly conveys the sound and texture of the environment, enhancing the reader's experience of the harsh conditions at Camp Green Lake. Such use of onomatopoeia helps to create a more immersive atmosphere in the story.