A Primary Group is a construct in Financial Services Cloud that allows you to define the main group for a client. You can use Primary Group to roll up financial data from all the financial accounts that are related to the client or the group. This way, you can get an accurate summary of the client's financial data regardless of how often they change households. Verified Reference: : Salesforce Financial Services Cloud Implementation Guide, page 69.

To display the most important fields on the side panel of ARC, the Admin must configure the Compact Layout for each object. The Compact Layout is a layout that determines which fields appear in key places in Salesforce such as record highlights areas, list views, lookup dialogs, and global search results. The Admin can use the Compact Layout to select up to 10 fields that are most relevant for each object and display them on the side panel of ARC

Explanation
To create a relationship between Rachel and her attorney before assigning the reciprocal role of "Attorney", the Wealth Advisor should create a Contact-Contact Relationship between the primary member of the Adams Household and the attorney. A Contact-Contact Relationship is a junction object that links two contacts or individuals and defines their relationship with each other2. By using Contact-Contact Relationship, the Wealth Advisor can capture Rachel's extended network of relationships with people outside of her household.
Verified References: 2

The following considerations should be included when configuring the report with branch management reportable objects:
Bankers with Branches with Opportunities, Accounts, Leads, and Contacts report types are available for creating reports with Branch Unit Related Records. These are standard report types that allow users to create reports that show data from Banker, Branch Unit, Opportunity, Account, Lead, Contact, and Branch Unit Related Record objects.
The reportable objects include Banker, Branch Unit, Branch Unit Related Records, and Branch Unit Customer. These are custom objects that are part of the branch management feature in Financial Services Cloud. Banker is an object that represents a banker or an employee who works at a branch unit. Branch Unit is an object that represents a physical location where bankers provide services to customers. Branch Unit Related Record is an object that represents a record that is related to a branch unit, such as an opportunity, an account, a lead, or a contact. Branch Unit Customer is an object that represents a customer who has a relationship with a branch unit.
When Branch Unit is the primary object, the administrator can select Branch Unit Customers or Branch Unit Related Records as related objects. This means that the administrator can create reports that show data from Branch Unit and its related objects by using lookup fields or junction objects.