They pollinate plants, which saves farmers work. Insects such as bees and butterflies help to pollinate plants.
If you have like water or a towel you can clean up the little cut to make it at bleeding
The reason that the edges of the leaves have water droplets is because plants lose most of their excess water through the stomata. this process is also called as transpiration. This can be seen mostly during the early morning time. I hope the answer comes to your help.