Final answer:If a letter doesn't have a return address, the postmark may provide clues about where it was mailed from. However, this is not a foolproof method asthe postmarkmay be hard to read, missing, or not indicative of the sender's actual location.Explanation:If a letter does not have a return address, you can sometimes determine where it was sent from by the postmark. The postmark is a stamp that thepostal serviceapplies to a piece of mail to denote the date and place of mailing. However, the postmark only indicates the location of the post office where the letter was mailed and doesn't necessarily reflectthe sender's location. For instance, if a person is travelling and they mail a letter, that letter would have the postmark of the location they're in, not their home location. Also, postmarks can sometimes be hard to read or even missing, particularly with automated postal machines.Return address, postmark, and letterare essential components you'd want to observe when figuring out where a mail could be from.Learn more about Identifying Origin of a Letter here:brainly.com/question/33809633#SPJ11...

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