The correct answer is **c. Thing in real world**.

### Explanation:
1. **Entity Definition**: In the context of databases and data modeling, an entity is fundamentally understood as an object or thing in the real world that is distinguishable from other objects.
2. **Examples of Entities**: Entities can include concepts such as a student, a car, or a product, all of which have a distinct existence in the subject area being studied.
3. **Relevance of Other Options**:
- a. **Model of relation**: This refers more specifically to how entities relate to each other within a model, rather than what an entity itself is.
- b. **Object of relation**: While related, this phrase is too vague and does not capture the standalone nature of an entity.
- d. **Present working model**: This implies functionality and operation, which is separate from the conceptual definition of an entity.

Thus, the best definition that captures the essence of an entity is that it is a "thing in the real world".

Question

The correct answer is **c. Thing in real world**.

### Explanation:
1. **Entity Definition**: In the context of databases and data modeling, an entity is fundamentally understood as an object or thing in the real world that is distinguishable from other objects. 
2. **Examples of Entities**: Entities can include concepts such as a student, a car, or a product, all of which have a distinct existence in the subject area being studied.
3. **Relevance of Other Options**:
   - a. **Model of relation**: This refers more specifically to how entities relate to each other within a model, rather than what an entity itself is.
   - b. **Object of relation**: While related, this phrase is too vague and does not capture the standalone nature of an entity.
   - d. **Present working model**: This implies functionality and operation, which is separate from the conceptual definition of an entity.

Thus, the best definition that captures the essence of an entity is that it is a "thing in the real world".

Knowee AI · Accepted Answer

The correct answer is **c. Thing in real world**.

### Explanation:
1. **Entity Definition**: In the context of databases and data modeling, an entity is fundamentally understood as an object or thing in the real world that is distinguishable from other objects. 
2. **Examples of Entities**: Entities can include concepts such as a student, a car, or a product, all of which have a distinct existence in the subject area being studied.
3. **Relevance of Other Options**:
   - a. **Model of relation**: This refers more specifically to how entities relate to each other within a model, rather than what an entity itself is.
   - b. **Object of relation**: While related, this phrase is too vague and does not capture the standalone nature of an entity.
   - d. **Present working model**: This implies functionality and operation, which is separate from the conceptual definition of an entity.

Thus, the best definition that captures the essence of an entity is that it is a "thing in the real world".

Entity is a _________a.Model of relationb.Object of relationc.Thing in real worldd. Present working model

Question

Entity is a

Solution

Explanation:

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