If the Bengal tiger becomes extinct,then . . . . . . .

Match the category in Column-$I$ with their description in Column-$II$.

Column-$I$	Column-$II$
$i$. Extinct	$a$. Decline in species population from $50\%$ to $70\%$ over last $10$ years.
$ii$. Endangered	$b$. Species that are abundant.
$iii$. Vulnerable	$c$. Species of which its last individual has died.
$iv$. Least concern	$d$. Decline in species population from $30\%$ to $50\%$ over last $10$ years.

Given below are two statements.
Statement $I$: $Rauwolfia$ $vomitoria$ found in Himalayan ranges shows variation in potency and concentration of active component reserpine.
Statement $II$: Ecosystem diversity is observed in regions of Rann of Kutch.
In the light of the above statements,choose the correct option.

Which of the following statements is wrong?

The given pie chart represents the biodiversity of invertebrates. Identify $a, b, c,$ and $d$.

Match the columns:

Column-$I$	Column-$II$
$(i)$ Nile perch in Lake Victoria	$(i)$ Obvious reasons for habitat destruction
$(ii)$ Narrowly utilitarian	$(ii)$ Habitat destruction
$(iii)$ Main cause for biodiversity loss	$(iii)$ High endemism
$(iv)$ Hotspot	$(iv)$ Alien species