I don't see "Print Selection" under any circumstances, and since it doesn't appear in System Prefs > Keyboard > Shortcuts > Services by default, it's apparently 3rd party, not Apple, related.
That is what it appears to me to be. 👌
NOTE: If you haven't discovered Services Menu extensions you are missing a lot of power features. Many Apps add their own features to the Services Menu but there are a number of apps available through the App Store whose only purpose is adding features to the Services Menu. This thread has already discussed
Print Selection but others I have found useful include:
- CalcService which offers a variety of math functions accessible through the Service menu.
- WordService which offfers a variety of text sorting and arranging options
- Textlicious that can change font, capitlization, invert characters, etc.
…and there are a host of others on the App Store. Unfortunately searching for "service" gets a lot of false hits so finding them can take some timed patience.