Biological control methods adopted in agricultural pest control are an example of which interaction?

Match List $I$ with List $II$ :

List $I$ (Interaction)	List $II$ (Species $A$ and $B$)
$A$. Mutualism	$I$. $+(A), 0(B)$
$B$. Commensalism	$II$. $-(A), 0(B)$
$C$. Amensalism	$III$. $+(A), -(B)$
$D$. Parasitism	$IV$. $+(A), +(B)$

Choose the correct answer from the options given below:

Match Column $-I$ with Column $-II$ and select the correct option.

Column $-I$	Column $-II$
$(a)$ Predation	$(i) \ (-, 0)$
$(b)$ Commensalism	$(ii) \ (+, -)$
$(c)$ Mutualism	$(iii) \ (+, 0)$
$(d)$ Amensalism	$(iv) \ (+, +)$

If the '$+$' sign is used for a beneficial interaction,the '$-$' sign for a detrimental interaction,and the '$0$' sign for a neutral interaction,then which population interaction is represented by '$+$' and '$-$'?

Level of competition between species depends on
$I.$ availability of resources
$II.$ population density
$III.$ group interaction of organisms
Choose the correct combination

The interaction between "Cuckoo and Crow" is an example of: