Final answer:
The relationship between 'engine' and 'plane' is a part to whole relationship. Hence, 'sail: ship' is the correct choice as it represents a similar relationship where a 'sail' is a part of a 'ship'.
Step-by-step explanation:
The relationship between the words engine and plane is that of a part to a whole; an engine is a part of a plane. When considering the answer choices provided with pairing words, sail: ship has a similar relationship. A sail is part of a ship much like an engine is part of a plane. The use of this type of analogy helps to understand the specific connections between words that share a certain logical relationship.
For example:
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- Hospital: doctor - This pair does not have the same relationship because a doctor is a person who works in a hospital, not a part of it.
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- Truck: vehicle - This pair is a type of the whole, not a part of the whole.
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- Wheat: tractor - This pair is a product to a tool used in its cultivation, which is not the same relationship as part to whole.