Beneficial Change-Lightning on a rainy day causing the formation of ozone[ O3 ]in the atmosphere.
Harmful Change-Deforestation causing the imbalance in nature.
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Om answered this
Change of day and night or change in seasons are beneficial changes. Rising of global temperature is very harmful change.
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Harshit Singh answered this
Beneficial change - Ripening of fruits.
Harmful change - State of war between two nations.
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Ritveek Kumar answered this
beneficial change- change in season
harmful change- milk turning sour