Box 1: Assign only Create rights to activities
You require the same set of Dataverse privileges and access rights to work with custom activities as those required to work with custom entities.
Task-based privileges, at the bottom of the form, give a user privileges to perform specific tasks, such as publish articles.
Box 2: Assign User-level assign rights to human resources case table.
Record-level privileges define which tasks a user with access to the record can do, such as Read, Create, Delete, Write, Assign, Share, Append, and Append To.
For user and team owned records, the access level choices for most privileges are tiered Organization, Business Unit, Business Unit and Child Business Unit or only the user's own records. That means for read privilege on contact, I could set user owned, and the user would only see their own records.
Incorrect Answers:
For security purposes, records that are organization owned, the only access level choices is either the user can do the operation or can't.
Reference:
https://docs.microsoft.com/en-us/power-platform/admin/security-roles-privileges https://docs.microsoft.com/en-us/power-platform/admin/wp-security-cds