What way does the author reveal details about Stanley in this excerpt?

Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.

Yes and no because if you know the vocabulary used you will understand it and go faster but you might not need it