Explain why human relations is important for all ages at all levels?

Human skills means how to tackle people, 
how to use their skills, how to work within a 
team. Human skills are cooperative efforts; 
it's teamwork. 
Human skills are very important at all the 
level of management because if you want to 
manage your business you cannot do without 
the cooperation of your subordinates. In 
management a phrase is very popular that is " 
treat people as human beings", if someone is 
a first line manager then he must posses the 
skills that how to getting work done by the 
labors, how to motivate them, how to 
facilitate them. Needs of using human skills is 
decreased with the level of management but 
it doesn't eliminated, therefore in all the level 
of management the manager should be kind 
and treat their candidates as colleagues not 
as competitors. He must have skills to listen 
people and not to only listen them giving 
better solution for their problem is the 
biggest responsibility for him. 
Hope this helps

Human skills means how to tackle people, how to use their skills, how to work.
Hope it helps.