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
In an average essay, you'll see the following:
- Introduction
- Body paragraphs (about 3)
- Conclusion
That means :
1 + 3 + 1 = 5
About 5 paragraphs is the normal essay length.
I would say personification