Explanation
Native debug feature is a tool that can be used to identify the problem with the new flow. Native debug feature allows users to test a flow by running it with different input values and inspecting the output values at each element. Users can also see error messages and warnings that indicate where the flow failed or might fail.
References: https://help.salesforce.com/s/articleView?id=sf.flow_debug.htm&type=5

Explanation
To identify new leads entered by interns from existing leads, the administrator should define a record type and assign it to the interns. This will allow them to select a different record type when creating leads, and distinguish them from other leads based on record type. Creating a separate Lead Lightning App or updating the active Lead Assignment Rules will not affect lead identification. Setting up Web-to-Lead form will not work if the interns are entering leads manually in Salesforce. References:
https://help.salesforce.com/s/articleView?id=sf.customize_recordtype.htm&type=5

Explanation
To display only the proper lead sources based on the product category chosen, an administrator should create a dependency between the Product Category field and Lead Source field on Lead object. A dependency is a relationship between two picklist fields that restricts the values available in one picklist based on the value selected in another picklist. For example, an administrator can create a dependency that shows only Online Store and Social Media as lead sources if Product Category is Shoes, but shows only Trade Show and Magazine as lead sources if Product Category is Apparel. Creating a page layout for each category, creating business processes and record types for each category, or creating a single business process with record types for each category will not display only the proper lead sources based on the product category chosen.
References: https://help.salesforce.com/s/articleView?id=sf.customize_dependent.htm&type=5

Explanation
A cross object formula field is a type of formula field that references fields from related objects using relationships such as lookup or master-detail. It can be used to display data from one object on another object without creating another relationship or copying data. A cross object formula field can be created on opportunity object to display data from industry field on account object using account ID lookup relationship.
A custom account field, a standard account field, or a master-detail relationship field are not types of fields that can display data from industry field on account object on opportunity page layout; they either do not exist or do not reference related objects. References:
https://help.salesforce.com/s/articleView?id=sf.cross_object_formulas.htm&type=5

Explanation
There are two possible reasons why users are unable to access a report based on a custom report type created by an administrator. One is that the custom report type is in development mode, which means that it is not deployed and available for use by other users except for administrators and users with manage custom report types permission. The other is that the report is saved in a private folder, which means that it is visible only to its owner and not shared with other users or groups. References:
https://help.salesforce.com/s/articleView?id=sf.reports_builder_custom_report_types.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.reports_builder_folders.htm&type=5