Why is comparison a necessary method of any scientific research?

Comparison is a necessary method of scientific research, since an important result cannot be obtained without it.
Comparison is a way to get information about the world. It is used to compare the objects under study in order to identify their common and different for, for example, building a classification.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.