Classify the following into desirable and undesirable changes:-
a)The spoiling of food
b)The digestion of food
c)The rotting of an egg
d)The rusting of iron

Dear student
Desirable changes:
b)The digestion of food

Undesirable changes
a)The spoiling of food
c)The rotting of an egg
d)The rusting of Iron

Regards

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