Explanation

Box 1: User3 only
Use the Members (self) option to have the users review their own role assignments.
Box 2: User3 will receive a confirmation request
Use the Should reviewer not respond list to specify what happens for users that are not reviewed by the reviewer within the review period. This setting does not impact users who have been reviewed by the reviewers manually. If the final reviewer's decision is Deny, then the user's access will be removed.
No change - Leave user's access unchanged
Remove access - Remove user's access
Approve access - Approve user's access
Take recommendations - Take the system's recommendation on denying or approving the user's continued access References:
https://docs.microsoft.com/bs-latn-ba/azure/active-directory/privileged-identity-management/pim-how-to-start-se

Reference:
https://docs.microsoft.com/en-us/azure/active-directory/privileged-identity-management/pim-deployment-plan

Explanation
To revoke a stored access policy, you can either delete it, or rename it by changing the signed identifier.
Changing the signed identifier breaks the associations between any existing signatures and the stored access policy. Deleting or renaming the stored access policy immediately affects all of the shared access signatures associated with it.
References:
https://docs.microsoft.com/en-us/rest/api/storageservices/Establishing-a-Stored-Access-Policy

Reference:
https://docs.microsoft.com/en-us/azure/sentinel/connect-windows-firewall

Explanation
When you transfer billing ownership of your subscription to an account in another Azure AD tenant, you can move the subscription to the new account's tenant. If you do so, all users, groups, or service principals who had role based access (RBAC) to manage subscriptions and its resources lose their access. Only the user in the new account who accepts your transfer request will have access to manage the resources.
Reference:
https://docs.microsoft.com/en-us/azure/billing/billing-subscription-transfer
https://docs.microsoft.com/en-us/azure/billing/billing-subscription-transfer#transferring-subscription-to-anaccou