Report Builder is the tool used to create reports, incorporate filters and select the Report Type. Data Loader is a tool used to import and export data in Salesforce. A csv file is a file format that can be used to import or export data in Salesforce, but it is not a tool to create reports. Report Composer is not a valid tool in Salesforce. References: https://help.salesforce.com/s/articleView?id=sf.reports_builder_overview.htm &type=5