What creates a feeling of doom and foreboding in chapter 3 lord of the flies?

In Chapter 3 of "Lord of the Flies," a feeling of doom and foreboding is created through the boys' increasing disregard for rules and order, the growing tensions among them, and the ominous presence of the beast on the island. Additionally, the boys' descent into savagery and their willingness to harm each other contribute to the sense of impending disaster.