why magnetic poles are concentrated only at north and south?

Answer 1

In magnetic poles,
like electric charges repel and unlike electric charges attract
ie, positive and positive ----------> repel
negative and negative ---------> repel
positive and negative ------------> attract
north and north----------> repel
south and south---------> repel
north and south----------> attract
So, magnetic poles are concentrated only at north and south

Answer 2

magnet only point toward the north pole