What is/ are the need to study to change?

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It helps us to know about the causes of change

It helps us to know about the effects of change

It helps us to control some undesirable changes

All of the above.

answer is D.

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Detailed Solution

The study of change is needed because:It helps us to know about the causes of change, It helps us to know about the effects of change ,It helps us to control some undesirable changes.
Change is a continuous process. Change is classified as Physical change, Chemical change, Desirable change, undesirable change, periodic change, reversible change, irreversible change etc. All these classes of change help us to know about the cause and effect of change and how we can control an undesirable change by knowing the effect and cause.

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