Which entity type cannot have a direct association with a dynamic entity?

A static entity cannot have a direct association with a dynamic entity because static entities are typically defined at design time and have a fixed schema. They are used for data that does not change in structure, while dynamic entities are designed to handle variable data structures that can be created or modified at runtime. The fundamental difference in their nature and purpose means that static entities cannot directly relate to the flexible and mutable characteristics of dynamic entities.

In contrast, the other entity types can have associations with dynamic entities. Base entities are foundational and can interact with various entities, including dynamic ones. Junction entities, which manage many-to-many relationships, and extension entities, which add specific features or attributes to base entities, are also suitable to be associated with dynamic entities, allowing for richer data models and interactions in applications.