Which feature allows users to connect to different data sources in Power BI?

Power Query is a powerful feature in Power BI that enables users to connect to a variety of data sources. It allows for the extraction, transformation, and loading (ETL) of data, meaning users can glean data from databases, web services, Excel files, and many other sources. This functionality is essential for data preparation, as it allows users to clean and manipulate their data before it's loaded into Power BI for visualization and analysis.

The versatility of Power Query is significant; it can handle complex queries and automate data retrieval processes. It provides a user-friendly interface to perform these operations without needing extensive coding knowledge, making it accessible for users with varying technical skills.

The other options do not serve the same fundamental purpose. Power View is focused on visualizing data, Power Map is designed for geographical data representation, and Power Apps is a platform for app development. None of these directly facilitate the connection to different data sources like Power Query does.