What is the interaction between two species called?

Relate Column $I$ with Column $II$ with regard to predatory behaviour:

Column $I$	Column $II$
$A$. Calotropis	$i$. Invertebrates
$B$. Pisaster	$ii$. Distasteful
$C$. Monarch butterfly	$iii$. Cryptically coloured
$D$. Frogs	$iv$. Cardio glycosides

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

The orchid $Ophrys$ employs 'sexual deceit' to get pollinated by a species of bee. One petal of its flower bears an uncanny resemblance to the female of the bee in size,colour,and markings. The male bee perceives it as the female and attempts to copulate with the flower. During this process,pollen grains are dusted on the male bee's body. What is this phenomenon called?

Competition is a rivalry between two or more organisms for obtaining the same resources. It is a type of

Competition is best defined as a process in which the fitness of one species (measured in terms of its '$r$',the intrinsic rate of increase) is significantly: