Now I have a game for you. In which of these did the flash fire?
I haven't made it easy for you, far from it. Firstly, I used a ring flash, not the usual kind. A ring flash works like the rectangular variety, but does away with shadows created by things that stick out, which is why it's often used in portraiture. I've also edited them (for other reasons, as it happens, but I didn't remove anything that might give the game away).
But I'll give you a huge, whopping great big clue. Look for where you'd expect shadows to be. If they're not there, that's where I used a flash.
This is tough, I should warn you. So, if anyone gets it completely right, I promise to do a nude selfie (although that should motivate anyone with half a brain and/or a full stomach to get'em all wrong).
And to be completely fair, here's the tech stuff: full-frame body + extension tube + 100 mm macro lens + ring flash (sometimes, maybe never? If it was used, I may - or may not - have set flash exposure compensation to -2/3). Edited in Lightroom and plugins. All the flowers were in direct Normandy sunlight (such as it is), if that helps.