How does a third person omniscient differ from a third person limited narrator

A third-person omniscient differs from a third-person limited narrator because one in one you know all of the characters thoughts and feelings and the other one you just know what the narrator is stating therefore it's limited.

Explanation: Omniscient, in which the narrator knows all of the thoughts and feelings of all of the characters in the story, or limited, in which the narrator relates only their own thoughts, feelings, and knowledge about various situations and the other characters.

in ray bradbury's short story "a sound of thunder", mr. eckels's fearfulness leads to drastic consequences for the rest of the world.

in the story, mr. eckels, who is a hunter, hires a time travel company to travel to the age of dinosaurs. although he is excited for the hunting expedition at the beginning, when they reach there and mr. eckels sees the tyrannosaurus, he feels frightened. as he is afraid of the tyrannosaurus, he steps off the path although he has been warned not to do it. by stepping off the path, the entire course of the future is affected: mr. eckart alters the future by stepping on a butterfly, which causes a new man to be elected president in the future. in that way, it is mr. eckart's fearfulness what triggers 'the butterfly effect' and what leads to drastic consequences for the rest of the world.