Killing an organism for feeding is

An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female of his species and tries to copulate with it, thereby pollinating the flower. This phenomenon is called

Predator helps to create checks on

$A$ : An ecological niche is usually occupied by a single species.
$R$ : More than one species can live in same habitat.

Animals eating plants are categorised separately as ...$A$..., they are in a broad ecological context, not very different from ...$B$...

Choose the correct option $A$ and $B$

$A$ : Five closely related species of warblers living on the same tree can avoid competition and co-exist.
$R$ : This occurs due to behavioural differences in their foraging activities.