Which ecosystem shows maximum genetic diversity?

Where is $70\%$ of the world's total freshwater found?

In the equation $S = CA^z$,where $S =$ species richness,$A =$ area,$Z =$ slope of the line,and $C =$ $Y$-intercept. If area is on the $X$-axis and species richness is on the $Y$-axis,what will the graph of $S = CA^z$ look like?

$(1)$ More than $\underline A\%$ of the drugs currently sold in the market worldwide are derived from plants.
$(2)$ Although all the biodiversity hotspots put together cover less than $\underline B\%$ of Earth's land area,the number of species they collectively harbour is extremely high,and strict protection of these hotspots could reduce the ongoing mass extinction by almost $\underline C\%$.

Which one of the following pairs of geographical areas show maximum biodiversity in our country?

Western Ghats have a large number of plant and animal species that are not found anywhere else. Which of the following terms will you use to notify such species?