Observe the set of $4$ figures $A$,$B$,$C$ and $D$ and answer the following questions:
$(i)$ Which one of the figures shows mutualism?
$(ii)$ What kind of association is shown in $D$?
$(iii)$ Name the organisms and the association in $C$.
$(iv)$ What role is the insect performing in $B$?

(N/A) $(i)$ Figure $A$ shows mutualism (plant and pollinator insect).
$(ii)$ Figure $D$ shows predation (leopard killing and eating a deer).
$(iii)$ Figure $C$ shows commensalism (cattle egret and grazing cattle).
$(iv)$ In figure $B$,the insect is performing phytophagy (feeding on the plant sap/nectar).