Which characteristic does mycorrhiza represent?

Competition for food,light,and space is most severe between two:

Which of the following is an example of a defense used by plants against herbivores?
$I.$ Production of caffeine,tannin,quinine
$II.$ More production of non-woody tissues
$III.$ Production of hairs,thorns,spines
$IV.$ Production of hormone-like chemicals that interfere with insect metamorphosis
Select the correct pair.

Match List-$I$ with List-$II$.

List-$I$ (Interacting species)	List-$II$ (Name of interaction)
$A$. $A$ Leopard and a Lion in a forest/grassland	$I$. Competition
$B$. $A$ Cuckoo laying egg in a Crow's nest	$II$. Brood parasitism
$C$. Fungi and root of a higher plant in Mycorrhizae	$III$. Mutualism
$D$. $A$ cattle egret and a Cattle in a field	$IV$. Commensalism

Choose the correct answer from the options given below.

Given below are two statements.
Statement $I$: Intraspecific competition occurs between organisms of the same population.
Statement $II$: Such interaction may be beneficial,harmful or neutral to the interacting individuals.
In the light of the above two statements,choose the correct option.

Which of the following exhibits parasitism on the stem of a plant?