Final answer:
A Junction Object in Salesforce is a custom object that has two master-detail relationships, allowing for the creation of many-to-many relationships between two other objects.
Step-by-step explanation:
A Junction Object is a type of custom object used in Salesforce to create many-to-many relationships between two objects. When you have two distinct objects that need to relate to each other in multiple instances, a junction object becomes necessary as it can be linked to each object record through two master-detail relationships. Essentially, it's a bridge between these two objects, allowing them to be associated in a versatile manner.
In the context of Salesforce and CRM platforms, the correct definition for a junction object is a custom object with two master-detail relationships. Therefore, the accurate answer to the student's question is:
- A custom object with a master-detail relationship
- A standard object with two master-detail relationships
- A standard object with a master-detail relationship
- A custom object with two master-detail relationships
The concept of a junction object is critical in complex database schemas where inter-object relationships are not strictly hierarchical and require such many-to-many linkages.