Which of the following is an example of shape in Piet Mondrian's Composition with Red, Yellow, and Blue? The color red
The color yellow
The lines
The rectangle

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.

What do you mean by this?