Which statement accurately describes the relationship between subtypes and supertypes in an application?

A subtype entity is indeed a child of a supertype entity, which allows it to inherit all fields from the supertype. This characteristic is a fundamental feature of object-oriented programming and model design, where subtypes are designed to extend or specialize the behavior of their supertypes. For example, if you have a supertype called "Vehicle," which has fields like "make," "model," and "year," a subtype called "Car" would inherit these fields, enabling it to have access to all the attributes defined in the "Vehicle" supertype. This inheritance allows developers to build complex hierarchies where shared characteristics are encapsulated in the supertype, promoting reuse and reducing redundancy in code.

In contrast, the other options fail to accurately reflect the nature of the relationship between subtypes and supertypes. The statement claiming that subtypes cannot inherit fields from supertype entities is incorrect because inheritance is precisely what allows subtypes to obtain fields from their supertypes. The idea that base application subtype entities can only be extended through interfaces misrepresents the inheritance mechanism since subtypes can directly inherit fields and methods from their supertypes. Lastly, while insisting that subtypes are completely independent of supertype entities contradicts the very concept of