give 10 examples of desirable changes and reversible changes

Dear Student ,

Desirable changes are those changes which we want to occur. These changes are useful for us.
For example : ripening of fruits , germination of seeds , change in season ,Milk changing into curd,a seed germinating and forming a new plant and bees changing nectar into honey etc.

Non desirable or Undesirable changes are those changes which we do not want to take place.
For example : rusting of iron, souring of milk, rottening of fruits and vegetables , global warming  Earthquakes, hurricane, tsunami Fruit rotting,a wooden chair being damaged by termites,burning waste paper  etc.

Regards

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desirable changes - Change of milk to curd, reopening of fruits,germination of seeds, cooking of food ,  baking of cake 
reversible changes  -  freezing of water , melting of ice , melting of chocolate , melting of butter   ,  melting of ice - cream
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