Question

when do we say that a change is undesirable?
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Answer 1

Answer:

The changes which are desired(need) to be change are called as desirable changes. Ex: Change of milk to curd, reopening of fruits… etc. Undesirable change: The changes which are not desired to change is called undesirable changes.

Answer 2

Desirable Changes: Those changes which are desired to occur that is, we want them to take place are known as desirable changes. Examples: ripening of fruits, germination of seeds etc. Undesirable change: Those changes which we do not want to take place are called undesirable changes.