Desirable and undesirable changes


•    Some changes are useful to us and we want them to take place. Such changes are called desirable changes.


•    We want the plants to grow, the fruits to ripen, wet clothes to dry and food to be cooked.

•    Some changes are harmful to us and we don’t want them to happen. These are called undesirable changes.


•    Accidents, disasters, spoiling of food are some undesirable changes.

•    Some changes are desirable at some times but undesirable at other times.