The following graph depicts changes in two populations ($A$ and $B$) of herbivores in a grassy field. $A$ possible reason for these changes is that

$A$ high density of elephant population in an area can result in

Describe mutualism in detail.

Which characteristic is observed in the $Gause's$ Competitive Exclusion Principle?

$A$ plant growing on another plant without drawing any nourishment is

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 $C$.