Which of the following is a composite element?

Comprehensive and Detailed in Depth Explanation:TheGroupingelement is acomposite elementin ArchiMate. Itcombines multiple elements into a single logical unitto simplify the representation of complex architectures.

UnlikeAggregation, which represents a relationship between a whole and its parts,Groupingallows the modeler to create arbitrary clusters of elements, regardless of their layer or type.

TheArchiMate 3.2 Specificationconfirms thatGroupingis a composite element used for structuring models and can include elements from different aspects and layers.

References:

Archi User Guide​

ArchiMate 3.2 Specification