Who explained the species-area relationship?

Which one of the following is not observed in biodiversity hotspots?

Which of the following regions is $NOT$ a biodiversity hotspot?

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.

What accounts for the greater ecological diversity of India?

The relationship between species richness and area is described by a straight line on a logarithmic scale using which equation?