Organisms that consume milk and curd can be classified as ........

What will happen to an ecosystem if:
$(a)$ All producers are removed;
$(b)$ All organisms of herbivore level are eliminated; and
$(c)$ All top carnivore population is removed?

$A$ : During succession,nutrient availability decreases while biomass level increases.
$R$ : $NCP$ (Net Community Productivity) remains same during succession.

Which of the following statements is incorrect regarding the phosphorus cycle?

$A$ snake feeds on a rat,a hawk feeds on the snake,and the rat feeds on a grasshopper. In this food chain,what is the trophic level of the rat?

Identify the given food chain:
Grass $\rightarrow$ Grasshopper $\rightarrow$ Birds $\rightarrow$ Lion