Who coined the term 'Biodiversity'?

Define the following terms:
$1$. Biodiversity
$2$. Species diversity

In the equation $\log S = \log C + Z \log A$,what does '$A$' represent?

Identify the correct statements :
$1.$ According to $\text{IUCN} (2004)$,the total number of described species is slightly more than $1.5$ million.
$2.$ Robert May estimated the total species diversity on Earth to be around $7$ billion.
$3.$ Insects make up more than $70 \%$ of all recorded animal species.
$4.$ India,with $2.4 \%$ of the world's land area,contributes $8.1 \%$ to global species diversity.

Which of the following is considered a hot-spot of biodiversity in India?

Even if all the biodiversity hotspots are put together,they cover less than $2 \%$ of the Earth's land area.