How does the use of metaphor contribute to the effectiveness of this argument?

"Often the truth for clients is not in their mind but in their heart or gut. Metaphors tend to bypass the analysis and target those powerful places." Because metaphorical expressions create powerful and lasting images and ideas, they are effective at communicating both tangible and conceptual information.

answer; /// the correct answer to the above statement is (a) because of the decline on native american labor forces;