Final answer:
The organizational structure of the provided speech excerpt by President Carter is chronological, as he describes the progression of topics over time.
Step-by-step explanation:
The organizational structure used in the paragraphs from President Jimmy Carter’s speech “Energy and the National Goals—A Crisis of Confidence” is chronological. This structure is evident as Carter recalls the progression over the past three years, from talking about a broad range of national concerns to becoming increasingly narrow and focused on the insular opinions of Washington. He notes a shift in dialogue from wide-ranging topics to what the government is or should be doing, indicating a change over time.