What is the relationship between entities and attributes?

Entities and attributes unable you to explicitly define what information, or data, is being
stored in the database. Relationships are the other powerful feature of relational modeling
and give the modeling technique its name. A relationship is a logical linkage between two
entities that describes how those entities are associated with each other. Think of
relationships as the logical links in a database that turn simple data into useful information.
For instance, our definition of a teacher reads: “A person employed by the college who is
responsible for instructing students in a class.”