There are many small organisms that play a vital role in many ecosystems, and that also need protection and conservation to sure that natural ecosystems function fully.
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This is extraordinary. When we think of large living "things", whales and elephants are the first creatures that come to mind. However, this one tops every other living creature, because it stretches for 1,600 miles.
If you examine a drop of pond water under a microscope, one of the smallest creatures you may see will be longish and shaped like a slipper, rounded at one end and thin at the other. it may be hard to believe, but this tiny living can be classified as an animal. this is because, like all other animals, it obtains food by eating plants and other organisms, and it must move about to find food.
The determine atmosphere we may say that it is an external physical and scientific program in which man and other creatures are available with many exciting elements.