Meaning: This sentence describes the cozy and warm atmosphere of a campfire on a summer night.
Choice of Words: "Campfire" is a fire built outdoors, usually for cooking or warmth. "Crackles" means making a series of short, sharp sounds. "Summer" is the warmest season of the year. "Night" is the time between sunset and sunrise. When you put these words together, you can imagine a campfire burning and making crackling sounds on a warm summer night.