Answer:
Entity - A single object that is unique in real world that is under observation.
Attribute - These are the trait or characteristics of the entity type which describes the entity.
Explanation:
An entity is a single object that is unique that is present in the real world and it under observation.For example:- an organization,single person,single product.
An attribute is the traits or the characteristics of an entity type which describes the entity for example the organization entity type has it's name as attribute.
