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The three examples of the range of variations in the life forms are:
(i) Variation in size: for example, the size of the bacteria are so small that they cannot be seen without observing under the microscope. Elephants, whales are so big mammals living species.
(ii) Variation in the colors: Some living creatures are colorless, such as worms, whereas creatures like insects, flowers, birds have beautiful colors on their body.
(iii) Variations in the lifespan: The insects usually have a very short life span of about a few hours while there are some life forms which do have a large lifespan for example Tortoise, shark, etc.