The association between a suckerfish $(Remora)$ and a shark is an example of:

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 $'+'$ sign is assigned to beneficial interaction,$'-'$ sign to detrimental and $'O'$ sign to neutral interaction,then the population interaction represented by $'+, -'$ refers to

Select the $CORRECT$ match:

List-$I$	List-$II$
$i$. Competition	$a$. Tapeworm and man
$ii$. Commensalism	$b$. Lichen
$iii$. Mutualism	$c$. Cattle egret and cattle
$iv$. Parasitism	$d$. Lions and Leopards

Which of the following plants develops various structures for protection against herbivores?

All the following interactions are mutualism,except