What is classification and what is its advantages ? 

Explanation

If is almost impossible to study all the living organisms.
So it is necessary to devise some means to make this possible.
This can be done by classifying the organisms.
Thus classification is the process by which organisms are grouped into convenient categories based on some easily observable characters.
Biological classification is the scientific arrangement, of organisms in a hierarchy of groups and sub groups on the basis of similarities and differences in their traits.
Advantages of classification :
(a) It helps to identify an organism easily.
(b) New organisms easily get correct place in their respective groups.
(c) It makes study of fossils easy.
(d) It also helps in building evolutionary pathways.
(e) It becomes easy to know the features of whole group by studying one or two organisms of the group.