Question

why all the living and non living things have different shapes

Answer 1

its god creation science have nothing to do with it

Answer 2

It is because all elements and compounds take a certain shape according to their physical and chemical properties. Liquids and gases take shape of the container they are placed in and solids can change shape when external forces are applied on it. The living beings, however, as they grow up, have a certain shape according to their evolutionary requirements.