Explanation

Box 1: Formula
Reading an Excel document retrieves the data from the document, allowing it to be processed and modified in flows.
Read and extract data from an Excel document with the Read from Excel worksheet action.
Box 2: Connector
Azure Data Lake Store connector allows you to read and add data to an Azure Data Lake account.
The Azure Data Lake connector is available for Power Automate.
Box 3: Expression
Reference:
https://docs.microsoft.com/en-us/learn/modules/pad-excel-automation/3-reading-excel-document
https://docs.microsoft.com/en-us/connectors/azuredatalake/