Which type of mail does NOT have a defined weight limit in the same way as others but can meet specific weight criteria?

The option referencing Anonymous Mail is the correct choice because it does not adhere to the same weight limit restrictions as other types of mail. Instead of having stringent weight criteria, Anonymous Mail is characterized mainly by the absence of identifying details about the sender or recipient. It allows for the sending of mail without revealing personal information, which can sometimes take various shapes and forms without a fixed weight limit.

In contrast, other mailing classifications, such as Parcel Post, Media Mail, and Standard Mail, all have defined weight limits. For instance, Parcel Post is designed for packages and has specific weight limits based on size and service type. Media Mail has limitations on the type of content that can be mailed, accompanied by weight restrictions as well. Standard Mail, primarily used for advertising and bulk mailing, also comes with its own set of weight regulations.

This distinction highlights the unique nature of Anonymous Mail, where the focus is less on weight and more on the anonymity of the sender, differentiating it from the other types of mail that are strictly regulated by weight limitations.