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

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 $B$

When the organisms live together in such a manner that one organism is benifitted, while other has no effects, it is called

 Explain sexual deceit.

Discuss the various types of positive interactions between species.

Explain competition in detail.