Question

Mention a change which is always,
A.Desirable
B.Undesirable
C.Periodic

Answer 1

Hint: We know that the changes occurring in the surrounding are mainly divided into three types and that is, desirable change, undesirable change, and periodic change. The desirable changes mainly occurred by nature, and there is a formation of changes that affect useful results to man. But in the case of undesirable changes, it may be useless or it may affect it very badly.

Complete answer:
According to the desirable changes, the changes always desired to take place and it is always conducted by nature and these changes produce good results and it is useful to all human beings. For example, changing milk into curd, seedlings of fruits into plants, and rain watering the crops. These all changes are classified into desirable changes.
In the case of undesirable changes, which are always carried out by man or nature and that changes that do not want to occur, because it is very harmful to nature and all human beings. Such types of changes are known as undesirable changes. For example, tsunami, earthquakes, hurricanes, and all-natural disasters.
The changes which repeat in a regular interval of time are known as periodic change. For example, the phenomenon of day and night, heart beating and moon exploitation and erosion, etc are examples of periodic changes. The changes occurring in the surrounding area are mainly divided into three types and that is, desirable change, undesirable change, and periodic change. The desirable changes mainly occurred by nature, and there is a formation of changes that affect useful results to man. But in the case of undesirable changes, it may be useless or it may affect very badly.

Note:
Mainly three types of changes are occurring in our nature and that is, desirable change, undesirable change, and periodic change. The desirable changes are very useful for our nature and men but the undesirable change is not at all useful for the human beings, because it affects human beings and nature in a very bad way.