What command creates an associative or non-associative body by extracting from existing objects?

The command that creates an associative or non-associative body by extracting from existing objects is the one that allows users to take geometry from an existing model and form new geometric entities based on that geometry. Extract Geometry is specifically designed for this purpose.

When using Extract Geometry, the user can choose to create a direct representation of the existing geometry that remains linked (associative) or make a standalone entity that can be modified independently (non-associative). This feature is particularly useful when needing to reference existing design elements without directly modifying them, allowing for more flexible design workflows.

The other options serve different purposes. For instance, Copy Feature is utilized to duplicate features from one part to another, ensuring direct feature copies rather than extracting geometric shapes. Create Interpart Link is aimed at linking components in assemblies, which is not designed for extracting shapes from models. Duplicate Geometry might seem similar, but it typically creates independent copies of existing geometry without the specific functionality related to the association status of the extraction. Thus, Extract Geometry distinctly fits the requirement of extracting and creating bodies from existing geometrical objects.