Answer
Shapes of man-made objects are computer generated images that use iteration to make the objects self-similar. But, natural objects such as leaves, snowflakes, and lightning are naturally self-similar and therefore they have a bit of randomness as well.
Work Step by Step
Objects in nature like coastlines, leaves, nautilus shells, human lungs, and ferns show a very peculiar property. In all these objects, a magnified portion repeats the pattern of the object as a whole. That means that a part of the object looks like the object as a whole. This property of an object is called self-similarity.
These natural objects are self-similar but not perfectly self-similar as they are not made by the use of computers taking the exact dimensions. Therefore, these objects may have some randomness as well. Example of the same can be seen as mentioned below:
