Which of the following is an unsubscription method?

One-Click Unsubscribe is indeed an unsubscription method that simplifies the process for users to remove themselves from an email list. This method allows recipients to unsubscribe by clicking a single button or link, usually located at the bottom of an email. This convenience reduces friction in the unsubscription process, encouraging a positive experience even when the recipient chooses to opt-out of receiving further communications.

In contrast, Account Verification Email, Subscription Confirmation Email, and Manual Entry Unsubscribe are associated with different aspects of managing subscriptions. Account Verification Email typically serves to confirm a user's email address when they sign up for a service or newsletter, ensuring that the subscription requests are authentic. Subscription Confirmation Email is sent to confirm that a user has successfully subscribed to a mailing list, reinforcing their choice to receive communications from the sender. Manual Entry Unsubscribe often requires users to enter their email address or account information to unsubscribe, which can create barriers and lead to higher friction compared to the one-click method. Thus, One-Click Unsubscribe stands out as the most straightforward and user-friendly method of opting out of email communications.