Answer:
Twain't ambition to travel to different places as a pilot of a steamboat reflects the American desire for expansion
Explanation:
Hope this helps
The analogies are the following:
1. Cause to effect: digestion - eat
2. Part to whole: organs - body
3. Word to antonym: day - night, word to synonym: serene - calm
4. Object to characteristic: sun - shine
5. Time sequence: marriage - children
6. Spatial order: garage - car