Select the mismatched pair regarding parasitism.

Statements
$I.$ Recent studies support competition as suggested in 'Gause's Competitive Exclusion Principle'.
$II.$ Gause's hypothesis states that if two species compete for the same resources,then one will be eliminated by the other species.
$III.$ More recent studies point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion.
$IV.$ Gause's competitive exclusion principle is effective when resources are in excess.
$V.$ Unlimited resources give better opportunity for adaptation.
Choose the correct combination of statements.

Explain the concept of parasitism with various examples.

Epiphyte is an example of

Match List-$I$ with List-$II$.

List-$I$	List-$II$
$A$. Both species are harmed	$I$. Predation
$B$. One species is harmed and the other is benefited	$II$. Mutualism
$C$. Both species are benefited	$III$. Competition
$D$. One is benefited while the other has no effect	$IV$. Commensalism

Choose the correct answer from the options given below:

What is the term for an interaction where both organisms benefit and are essential for each other's survival?