The administrator at Universal Container has created two objects: Containers_c Purchase_c, Management has requested that all container records display on purchase records in Salesforce. Which type…

A Roll-Up Summary field aggregates data from related detail records onto a master record, but it does not define the relationship itself; it depends on an existing Master-Detail relationship.

A Formula field calculates values based on other fields and does not establish a relationship between two objects for displaying related lists.

While a Master-Detail relationship also displays related records, a Lookup relationship is sufficient for merely displaying related records and offers more flexibility if strict ownership/security inheritance or roll-up summaries are not explicitly required.

A Lookup relationship links two objects, and by creating a Lookup field on the 'Containers__c' object pointing to 'Purchase__c', multiple Container records can be associated with a single Purchase record, automatically displaying them in a related list on the Purchase record.