Who can create and manage access keys for an AWS account root user?

Explanations:

The AWS account owner, or root user, has full permissions and can create and manage access keys for their own account. This includes the ability to generate and delete access keys.

While an IAM user with administrator permissions has extensive rights, they cannot create or manage access keys for the root user. Only the root user can manage its own access keys.

IAM users within a designated group do not have permission to manage access keys for the root user unless explicitly granted permissions, which is generally not the case. Access keys for the root user can only be managed by the root user themselves.

An IAM user with a required role cannot manage access keys for the root user unless that specific permission is granted. Generally, managing root access keys is limited to the root user only.