Give an example of desirable change which can also be undesirable.

Hint: We know that the progressions which are desired (need) to be changed are called desirable change and the progressions which are not wanted to change are called undesirable changes.

Complete step by step answer:
Let us see concept and examples for desirable and Undesirable changes:
Desirable changes: Changes which are wanted to happen (for example we need them to occur) are known as attractive changes.
These progressions produce great outcomes.
Models: Rain carrying water to the yields brings about germination of seeds, change of milk to curd, maturing of organic products, and development of a seedling into a plant.
Now we discuss about the undesirable changes as,
Undesirable Changes: Changes achieved by an individual or essentially which are destructive are known as bothersome or no agreeable changes.
Models: Rain causing devastation by floods, souring of milk.

Note: Now we discuss about the physical changes as,
Another approach to consider this is that an actual change doesn't make a substance become an on a very basic level distinctive substance yet a synthetic change makes a substance change into something synthetically new. Mixing a smoothie, for instance, includes two actual changes: the adjustment fit as a fiddle of each food grown from the ground combining a wide range of bits of organic product. Since none of the synthetics in the smoothie segments are changed during mixing (the water and nutrients from the natural product are unaltered, for instance), we realize that no substance changes are included.
Now we discuss about the chemical changes as,
Chemical Changes are otherwise called substance reactions. The "fixings" of a response are known as the reactants, and the outcomes are known as the items. The change from reactants to items is meant by a bolt:
\[Reactants{\text{ }} \to {\text{ }}Products\]
Decaying, consuming, cooking, and rusting are largely further kinds of synthetic changes since they produce substances that are altogether new synthetic mixes. For instance, consumed wood becomes debris, carbon dioxide, and water. At the point when presented to water, iron turns into a combination of a few hydrated iron oxides and hydroxides. Yeast completes maturation to create liquor from sugar.