In which of the following interactions are both partners adversely affected?

You never see any cattle or goat browsing on $Calotropis$ due to

Which type of interaction is seen between sea anemone and clown fish?

Given below are two statements:
Statement $I$: Competition can be defined as a process in which the fitness of one species is significantly lower in the presence of another species.
Statement $II$: According to Darwin,interspecific competition is a potent force in organic evolution.

Match the pairs of partners showing interspecific interaction from Column-$I$ and Column-$II$:

Column-$I$	Column-$II$
$a$. Sea anemone	$i$. Cyanobacteria
$b$. Plant	$ii$. Man
$c$. Plasmodium	$iii$. Herbivore
$d$. Fungi	$iv$. Clown fish

What kind of interrelationships exist between organisms in the biosphere?