What limits are there to the current classification system

Physical trait is the major limitation present in the current classification system.

Explanation:

Classification is the process through which we see the relationship between various things. During classification we categorize things that helps us to make a proper subjective judgement. The limitation of classifications are they are biased , that is who are participating may not have same physical traits. As a result difference occurs in perceived value. Another huge problem is human beings make classification for satisfying their own purpose . The natural world behaves in its own way that is by not following any classification.

Acovalent bond is formed between the two hydrogen bonds