Issue 1: Titles embedded in figures. The guidelines explicitly state: "Do not include titles or captions within your illustrations." All four figures have their titles baked into the image (e.g., "Figure 1. Two-Factor Model of Reflexive Processing in LLMs" is rendered inside Fig1.png). The captions should only appear in the manuscript text, which yours already have. You need to regenerate the figures without the title lines at the top.
Issue 2: Resolution. CB&B classifies figures with both text and graphics as "combination art" requiring minimum 600 dpi. Your current sizes at column width (~174mm) work out to roughly 130190 dpi depending on the figure. That's below threshold. You'll want to export at higher resolution from whatever tool you used to create them  at least 2x current pixel dimensions to get into the 300+ range, ideally 3x for the 600 dpi target.