If the strong partner is benefitted and the weak partner is damaged,it is known as:

Describe commensalism.

What is the function of predation?

Explain commensalism with the example of an egret and cattle.

In which type of interactions do both the interacting organisms not necessarily live close together?

Study the following four statements $(1-4)$ and select the two which are correct:
$(1)$ Lion eating deer and sparrow feeding on grain are ecologically similar in being consumers.
$(2)$ The predator starfish $Pisaster$ helps in maintaining species diversity of some invertebrates.
$(3)$ Predators often lead to the extinction of prey species.
$(4)$ Production of chemicals such as nicotine and strychnine by plants is a metabolic disorder.
Which two statements are correct?