The World Summit on Sustainable Development held in $2002$ in Johannesburg,South Africa,pledged for:

In the given pie chart representing global invertebrate diversity, what do '$x$' and '$y$' represent respectively?

Using the provided graph,determine the percentage of bird species that will be lost if the island's inhabitable land area is reduced from $100,000\, km^2$ to $1\, km^2$.

What does '$W$' 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.

What does '$X$' represent in the given graph?