o bring custom components into the new Lightning app for DreamHouse Realty, an app builder can consider the following two resources:
AppExchange: The AppExchange is a marketplace for pre-built Salesforce applications, components, and solutions. App builders can search and browse through the available components on the AppExchange to find suitable custom components for their Lightning app.
Apex Code: While Apex Code is primarily used for customizing and extending Salesforce functionality through server-side programming, it can also be used to develop custom Lightning components. App builders with development skills can create their own custom Lightning components using Apex Code to meet specific requirements of the Lightning app.