Final answer:
The bold-faced section in Roosevelt's address uses personification by attributing the human-like abilities to 'thrive' and 'live' to the non-human entity 'confidence'.
Step-by-step explanation:
The bold-faced section from Franklin D. Roosevelt's inaugural address: 'for it thrives only on honesty, on honor, on the sacredness of obligations, on faithful protection, on unselfish performance; without them it cannot live', is an example of personification. Personification is a technique where human qualities are attributed to non-human entities. Hence, in this excerpt, 'confidence' is given the human ability to 'thrive' and 'live' based on moral attributes, which is a characteristic distinctive to humans.