What does '$V$' represent in the given figure?

Which of the following statement$(s)$ is/are correct?
$(i)$ Rich biodiversity is not essential for ecosystem health.
$(ii)$ The current rate of species extinction is $100$ to $1000$ times faster than the pre-human extinction rate.
$(iii)$ Steller's sea cow became extinct due to overexploitation by humans.
$(iv)$ Even if we combine all biodiversity hotspots,they cover less than $2 \%$ of the Earth's land area.
$(v)$ The rate of mass extinction can be completely reduced by strict protection of hotspots.

Match the following columns:

Column-$I$	Column-$II$
$(a)$ Clarias gariepinus	$(1)$ Zebra
$(b)$ Lantana	$(2)$ Tiger
$(c)$ Bali	$(3)$ Weed
$(d)$ Quagga	$(4)$ African Catfish

Mangrove vegetation is found in

Match List $I$ with List $II$:

List $I$	List $II$
$A$. Robert May	$I$. Species-Area relationship
$B$. Alexander von Humboldt	$II$. Long term ecosystem experiment using outdoor plots
$C$. Paul Ehrlich	$III$. Global species diversity at about $7$ million
$D$. David Tilman	$IV$. Rivet popper hypothesis

Choose the correct answer from the options given below:

Given below is the representation of the extent of global diversity of invertebrates. What groups do the four portions $(a, b, c, d)$ represent respectively?