The answer here is 4, Idiom. Idioms are sayings that may be taken literally, but it's a type of figurative language. One example is the very common saying: "It's raining Cats and Dogs." When someone says that, it isn't literally cats and dogs falling from the sky, but it's raining really hard.
Answer: The phrase make a difference would make the audience want to go out and change the world.
The phrase economic slavery creates an image that would make the audience sad or angry.
Explanation: