By default, who can access and use a model you have created?

The correct answer reflects that by default, a model created in Power Platform is accessible only to the individual who created it. This model is stored within the personal environment of the user, which is designed to provide a private workspace for development and experimentation. Consequently, only the creator has the permissions to view or interact with this model unless they explicitly share it with others.

When a model is developed, it initially resides in the creator's personal environment dedicated to private usage. This design encourages users to build and test their models without regard for sharing permissions or visibility. Access can be expanded later on as needed, depending on business requirements and collaboration goals, but the default state ensures a level of privacy and control for the creator.