Read the excerpt from the poem "Barbara Frietchie.” Under his slouched hat left and right He glanced: the old flag met his sight. "Halt!”— the dust-brown ranks stood fast. "Fire!”— out blazed the rifle-blast. What is the significance of the exclamations "Halt!” and "Fire!”? They foreshadow what will happen next. They move the action forward with dialogue. They stop the movement of the poem. They describe the sound of Jackson's voice.