it is a screenshot
It's a photo/picture, screenshots are shots from your screen.
As in, what you saw through the monitor you are looking at.
Okay, you can watch a photo on the computer too, but that's not the point.
The point is, shut up troll.

Or i'll kill you with my pet rocket sentry.

In case you don't run into a witch.
EDIT2:
Ew my screenshots got into jpeg format! :C