Question

prepare a model on any natural cycle and present it in a science exibbition

Answer 1

which exhibition do you want me to present it to?

Answer 2

Let's take an example of water cycle which is a natural cycle. Now what is water cycle we have to know. The water cycle describes the continuous movement of water on, above and below the surface of the Earth.

Now make a mountain using cardboard or marble board. And the whole model should be based on thermocol board. Make river canvases and paint them blue. Thus you should make the model.