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Answer:
The answer to this question is River System.
Explanation:
When there is a flowing network of streams and rivers that are moving across a land area is called a river system.
As we all know that the streams are connected to rivers and the rivers across a land are also connected or may be not but they form a large network of rivers.
The use of the inheritance to have a structure inherit attributes and methods of classes above it.
One of the key milestones in the period in which the object-relational model was created was the creation of a data
model that closely represented the real world. In this approach, objects were created in which both data and its
relationships were all contained in one place. These data models were becoming a norm to be stored on the web. They
also incorporated support for star schemas within data warehouses. Objects that had similar characteristics were
grouped into classes, where they had a shared structure of attributes and behaviors.
