Final answer:
The purpose of a nacelle in an aircraft engine is housing for the engine. It provides a protective outer structure and helps in directing airflow.
Step-by-step explanation:
The purpose of a nacelle in an aircraft engine is housing for the engine. It provides a protective outer structure that encloses the engine and its components, keeping them secure and providing aerodynamic benefits. The nacelle also helps in directing the airflow and preventing debris from entering the engine.
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