Final answer:
A concept map is the suitable graphic organizer best representing the connections between ideas in an excerpt from 'Wheels of Change, Part 6', portraying the structure of a proposal.
Step-by-step explanation:
In the context of Wheels of Change, Part 6, to best represent the connection between ideas in the given excerpt, a concept map would be the most fitting graphic organizer. The excerpt describes how a proposal has a recognizable shape, starting with an introduction, discussing the problem, exploring possible solutions, potential objections, and concluding with a recommendation. A concept map can effectively show these connections and the hierarchical structure of a proposal, from a broad concept to specific, related details.