When the organisms live together in such a manner that one organism is benifitted, while other has no effects, it is called
Commensalism
Parasitism
Mutualism
All of the above
When one organism is benefitted without affecting the others is called
Pollinator mutualism are special interactions involving ...$A$..., which receive food or a place to lay eggs and ...$B$..., which receive polle from other of their kind.
Choose of correct option for $A$ and $B$
$A$ : An ecological niche is usually occupied by a single species.
$R$ : More than one species can live in same habitat.
Give a suitable example for commensalism.