A brood of hensA stand of flamingosA murder of crowsAn intrusion of cockroachesAn army of caterpillarsA...

A tower of giraffesA knot of toadsA prickle of porcupinesA waddle of penguins (on land)A raft of penguins...

वह व्यक्ति जो सबको कड़े अनुशासन में रखें...

be cruel to be kind - किसी को कुछ ऐसा कहना या करना जिससे...

in kind - उसी तरह से (In the same way)If he responded positively, they would respond...