1 and 3 have the most potential the rest seem flat and boring imo.
1 should have been rotated i think its awkward to look at almost feel like flipping my monitor vertically. the shadow on the snail is also distracting.
3) i would of crouched down so the camera was almost level with the grass to take the pictures. so you could see only the upper half of the dog. also (at least i think) the subject is a bit to far away and should of been a bit closer
out of 1,3,4 only #1 seems focused. are you using auto focus for these? like in #4 the beetle should be focused but (unless my eyes are bad) looks like the bottom left blades of grass are. and in #3 the dog should be focused (not quite sure where its focused)