To extract data out of Fusion SaaS applications and load it into Autonomous Data Warehouse (ADW) using Oracle Data Integrator (ODI), the required topology elements are: 1) Object Storage, which provides a scalable and secure location to store and manage data files, making it possible to handle large amounts of data efficiently in the cloud. 2) BI Cloud Connector (BICC), a tool specifically designed to integrate Oracle Fusion applications with other systems, making data extraction seamless. 3) Oracle (ADW), which is the ultimate target destination for loading the extracted data, enabling streamlined and enhanced data warehousing capabilities. These three components together facilitate the extraction, transfer, and storage processes necessary for efficient data handling and analysis.