Among the mathematical indices for measuring bio-diversity, which one shows the mean species diversity in a habitat at a local scale?

The Himalayan range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?

Among the following Tiger Reserves, which one has the largest area under “Critical Tiger Habitat”?

Which one among the following Biosphere Reserves is spread over three states in India?

Which one of the following is the correct sequential phase in the successional development of vegetation community in a habitat?

Which one of the following biosphere reserves is spread over three States in India?