Developing or underdeveloped nations are rich in which of the following aspects?

Define/Explain: Genetic diversity.

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

Initially $A$ biodiversity hot spots were identified but subsequently nine more have been added to the list,bringing the total number of biodiversity hot spots in the world to $B$. These hot spots are the regions of accelerated habitat loss. Three of these hot spots—Western Ghats and Sri Lanka,Indo-Burma,and Himalaya—cover our country's exceptionally high biodiversity regions. Although all the biodiversity hot spots put together cover less than $C$ $\%$ of the earth's land area,the number of species they collectively harbour is extremely high,and the strict protection of these hot spots could reduce the ongoing mass extinctions by almost $D$ $\%$. $A, B, C$ and $D$ in the paragraph refer to:

Choose the correct matching for the Amazon rainforest biodiversity data: $a$-mammals,$b$-$1300$ species,$c$-$3000$ species,$d$-$427$ species,$e$-birds,$f$-fishes.

What is the difference between endemic and exotic species?