Sunlight? If so, with such a dark subject on such a light flower that is a really difficult combination using natural light. The bee is nicely exposed though, and sharp just where it should be. It looks good. Well done.
Is the first one a rather bigger crop than the others? The bee doesn't look as sharp to me as in the other two. Or perhaps the centre of focus is in front of the bee? I'm looking at the flower at the bottom centre, next to the one with the tiny animal in it.