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

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

Even a plant species,which makes its own food,cannot survive alone; it needs soil microbes to breakdown the $A$ matter in soil and return the $B$ nutrients for absorption. And then,how will the plant manage pollination without an animal agent? It is obvious that in nature,animals,plants and microbes cannot live in $C$ but interact in various ways to form a biological community. Choose the correct option for $A, B$ and $C$.

Identify the positive interaction.

What is the term for an interaction where both organisms benefit and are essential for each other's survival?

$E. coli$ in the human colon behaves as: