Share ''Dramatic Scaffolding''

I received another glowing rejection letter today. The agent said she liked my writing, said I have a terrific voice and a keen sense of storytelling. But she mentioned the pace was a bit slow and that most editors will want to see 'a clear idea of the dramatic scaffold' in chapter 1. Does anyone have a clear understanding of what that exactly means? If you do, put it in layman terms, and give e…