Avoidance behavior refers to the occurrence of behavior that prevents the occurrence of certain negative stimuli. Which of the following meets this definition? ['A bare-footed man stepped on the hot asphalt, he immediately jumped to the grass.', 'The speaker sounded like an explosion when the army started the car, he quickly turned down the volume.', 'In the cinema, the people around Peng Peng spoke loudly, and he sat in a seat away from these people.', 'A sound is made to the rat before each electric shock. After several tests, as soon as the sound is made, the rat starts to escape.']