Your images are pretty much run of the mill shots average beginner shots, nothing really interesting or eye catching. The one with the sunset commits the cardinal sin of a slanted horizon and you seem to attempt to isolate your subjects by just zooming in rather than concentrate on using compositional elements. You need to understand composition and you need to use a tripod as a lot of your images are ever so slightly out of focus. The Dragonfly shot has the main subject of interest way too low in the frame for my liking but that's my personal opinion. The one with the orange flower is nice as you have isolated the flower against a different colour background, which gives it a slight edge. I like the framing on the waterfall, that has isolated a bright subject into a "dark shadow ring" but it's out of focus which is a shame, guessing you may have been on a boat or the cave was very dark, tricky shot to pull off.
Concentrate more on understanding good basic composition and try to be more steady with the camera.
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