Answer:
1. heart is to body as engine is to car.
Explanation:
This is the typical way for an analogy to be read. Something is to something as another thing is to another thing.
For example:
rifle is to guns as sabre is to swords.
Essentially, a specific is to general, and is used for both. Rifle is a specific type of gun, and gun is the generalization. Sabre is a specific type of sword, and sword is the generalization.
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