Colors in this photo are good. I like seeing the bee in motion. I think that the harsh sun causes us to lose some of the detail on the insect, especially in the wings. Perhaps underexposing the photo would help a little with that. Good composition!
4 - Great concept and 'stage'. Good shadow of the bee even . As I am sure you know, it just needs that 'focus'. A slightly tighter zoom might have helped, not sure.
The shadow on the morning glory is a nice touch, but the overall photograph is blurred. I wish it were in focus. I'd crop out the leaves tne concentrate on the bug and beautiful purple variations in the flower.