Which of the following shows maximum genetic diversity in India?

Given below are pie diagrams $I$,$II$ and $III$ related to the proportionate number of species of major taxa of invertebrates,vertebrates and plants respectively. Critically study and fill in the blanks $A, B, C$ and $D$.

The term 'Alpha diversity' refers to

Spot out the zone of our country considered as the hot spot of biodiversity and regarded as the "Cradle of Speciation".

Which of the following hypotheses suggests that ecosystems are like aeroplane wings, where the flight (ecosystem functioning) may or may not be compromised depending upon which species are being lost?

Which part of the world has the highest population density of species?