$Eichhornia$ $crassipes$ is a

Which of the following is an example of a recently extinct animal?

Which of the following is the most important cause for animals and plants being driven to extinction?

Assertion: Tropical rain forests are disappearing fast from developing countries such as India.
Reason: No value is attached to these forests because these are poor in biodiversity.

In the current era,$\underline{X \%}$ of all bird species and $\underline{Y \%}$ of all amphibian species in the world are facing the threat of extinction.

Match the following columns:

Column-$I$	Column-$II$
$(P)$ Dodo	$(I)$ Russia
$(Q)$ Quagga	$(II)$ Mauritius
$(R)$ Thylacine	$(III)$ Africa
$(S)$ Steller's sea cow	$(IV)$ Australia