This is because the diagram shows the three main categories of relationships in ArchiMate: structural relationships, which model the static construction or composition of concepts; dependency relationships, which model how elements depend on or use other elements; and dynamic relationships, which model the temporal or causal connections between elements.

Based on the ArchiMate 3 documents or objectives, an assessment represents the result of an analysis of the state of affairs of the enterprise with respect to some driver. An assessment may reveal strengths, weaknesses, opportunities, or threats for some area of interest. An assessment is a motivation element that can be associated with other motivation elements such as stakeholders, drivers, goals, outcomes, etc. The notation for an assessment is a rectangle with a rounded top and a horizontal line inside it. The symbol in this question is an assessment that expresses the analysis of ArchiSurance's situation.

Based on the ArchiMate 3 documents or objectives, a data object is a passive structure element that represents a piece of data that can be manipulated by behavior elements such as application functions or services. A passive structure element is a structural element that cannot perform behavior. Active structure elements can perform behavior on passive structure elements.

Comprehensive and Detailed in Depth Explanation:ABusiness Interfaceis an external active structure element that provides an external point of access to one or more Business Services. In theBusiness Layer metamodel, aBusiness Serviceis assigned to aBusiness Interfacebecause interfaces define how services are exposed to external parties or other components within an enterprise.
This is confirmed in theArchiMate Specification 3.2, where aBusiness Interfaceis described as representing a point of interaction that enables access toBusiness Services.
References:
* Archi User Guide
* ArchiMate 3.2 Specification

Based on the ArchiMate 3 documents or objectives, the diagram uses a composition relationship to indicate that the financial processing function consists of three sub-functions A, B, and C. A composition relationship is a type of structural relationship that represents a whole-part hierarchy between elements. The notation for a composition relationship is a solid line with a filled diamond at the end that points to the whole element.
References: ArchiMate 3.2 Specification, Chapter 4 Generic Metamodel, Section 4.1 Behavior and Structure Elements, Subsection 4.1.2 Structural Relationships 1.