The level of ecological diversity representing organisms sharing the same habitat or community is termed as:

Read the following statements carefully and mark the correct option given below.
Statement-$I$: India is one of the $12$ mega diversity countries of the world.
Statement-$II$: India has only $2.4 \%$ of the world's land area.

The largest endangered bird in India is

Describe biodiversity.

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:

The measure of the variety of species and their relative abundance present within a region is referred to as