Death of the host shall be disastrous to:

Killing an organism for feeding is known as:

Name the association in which one species produces a poisonous substance or a change in environmental conditions that is harmful to another species.

Choose the incorrect sentence.

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

Match the following columns:

Column-$I$	Column-$II$
$P. +,+$	$I. \text{Mutualism}$
$Q. -,-$	$II. \text{Parasitism}$
$R. -,0$	$III. \text{Competition}$
$S. +,0$	$IV. \text{Amensalism}$
$T. +,-$	$V. \text{Commensalism}$
	$VI. \text{Predation}$