1. The document discusses expository texts and the relationship between visual and verbal elements in such texts. It defines expository texts as those meant to explain, inform, and present facts, and notes that authors often include visual elements like graphs, tables, maps and illustrations to further highlight information.
2. It explains that Braden coined the terms "visual-verbal symbiosis" and "visual-verbal discontinuity" to refer to the relationships between visual and verbal components, and that Dwyer found visual and verbal literacies facilitate learning when combined symbiotically with each supporting the other.
3. The concept of visual-verbal symbiosis holds that visual elements support verbal parts and vice versa in a text.