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In low level design, identifying objects and relationships is a fundamental step in the development process. Objects represent ___ or concepts in the system, while relationships define how these objects interact with each other.

In the context of designing a payment app, identifying objects involves identifying the various components and entities that are part of the payment system. These could include ____, ____, ____, and ___, among others.

Once the objects are identified, the next step is to understand the relationships between these objects. Relationships can be classified as ____, ____, or ____, depending on how the objects are connected. For example, in a payment app, a ____ may have multiple payment methods (one-to-many relationship) and a payment method can be linked to multiple accounts (many-to-many relationship).

Identifying objects and relationships helps in understanding the structure and behavior of the system, and forms the basis for designing the ____ diagram and the ____ schema.