Solution
Option 1 -> The passage mentions that graceful carriage reveals "self-possession" and "inner harmony," and notes that poor posture "diminishes public and private standing," suggesting it affects one's self-esteem and personal dignity.
Option 2 -> Explicitly stated: "Awkwardness creates prejudice; stumbling in manner suggests insecurity or a lack of confidence" - directly addressing how poor carriage leads to prejudice and signals nervousness.
Option 3 -> While the author warns against slouching over books, this is about maintaining posture for health and appearance, not about enhancing learning ability itself.
Option 4 -> Nothing in the passage connects elegant carriage to displaying wealth or possessions; the focus is on manner and deportment, not material display.
Hence, Options 1 and 2 -> The author emphasizes that graceful carriage serves dual purposes: externally, it avoids prejudice and prevents others from perceiving insecurity (Option 2 - explicitly stated), and internally, it maintains self-possession, inner harmony, and one's standing in both public and private spheres, which relates to self-esteem and personal growth (Option 1 - implied through references to private standing and inner harmony) -> correct