American lakes visiting flamingoes and resident fishes compete for their common food …$A$… in the lake resources …$B$… limiting for competition to occur; in interference competition, the feeding efficiency of one species might be …$C$… due to the interfering and inhibitory presence of the other species, even if resources (food and space) are abundant

Choose the correct option for $A , B$ and $C$

Between which among the following, the relationship is not an example of commensalism?

Describe commensalism.

Choose correct group for commensalism from the following

$(a)$ The cattle egret and grazing cattle

$(b)$ Barnacle balanus and Barnacle chathamalus

$(c)$ Goat and Abingdon turtle from Galapagosisland

$(d)$ Barnacles growing on the back of whale

$A$ : 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.