Why do we classify organisms?what is nutricent? What is the body design

@ jaseem 
we need to clasify organisms due to the following reason 
1- to study their nature and behaviour , 

2- studying the charecteristics of all the phyla are not easy without catagorise them 
3- its difficult to identify the known and extinct species , if we will not classify them . 
nutrient is actually the components that we get by eating the food , thats required for daily living organism . 
HOPE IT CLEARS NOW 
ALL THE BEST ..