According to the Salesforce documentation, a relationship field is a field that allows linking one

object to another object in Salesforce. There are different types of relationship fields that have

different characteristics and behaviors, such as master-detail, lookup, indirect lookup, external

lookup, etc.

To recommend a type of relationship field for this scenario, where legacy inventory data will be

stored in a custom child object called Inventory__c, inventory data should be related to the standard

Account object, the Inventory__c object should inherit the same sharing rules as the Account object,

and anytime an Account record is deleted in Salesforce, the related Inventory__c record(s) should be

deleted as well, a data architect should recommend:

Master-detail relationship field on Inventory__c, related to Account (option B). This means creating a

field on the Inventory__c object that

the Account object as its parent. A master-detail

relationship field establishes a parent-child relationship between two objects, where the parent

object controls certain behaviors of the child object. For example, a master-detail relationship field

can:

Inherit the sharing and security settings from the parent object to the child object. This means that

the users who can access and edit the parent record can also access and edit the related child

records.

Cascade delete from the parent object to the child object. This means that when a parent record is

deleted, all the related child records are also deleted.

Roll up summary fields from the child object to the parent object. This means that the parent object

can display aggregated information from the child records, such as count, sum, min, max, or average.

Master-detail relationship field on Account, related to Inventory__c (option A) is not a good solution,

as it reverses the direction of the relationship. This means creating a field on the Account object that

references the Inventory__c object as its parent. This is not possible, as a standard object cannot be

on the detail side of a master-detail relationship. Indirect lookup relationship field on Account,

related to Inventory__c (option C) is also not a good solution, as it is a special type of relationship

field that allows linking a custom object to a standard object on an external system using an indirect

reference. This is not applicable for this scenario, as both objects are in Salesforce and do not need

an external reference. Lookup relationship field on Inventory__c related to Account (option D) is also

not a good solution, as it establishes a looser relationship between two objects than a master-detail

relationship. A lookup relationship field does not inherit sharing and security settings from the

parent object to the child object, does not cascade delete from the parent object to the child object,

and does not roll up summary fields from the child object to the parent object.