How many species of Amphibians are present in the Amazonian rain forest in South America?

How many countries pledged their commitment to achieve by $2010$,a significant reduction in the current rate of biodiversity loss at global,regional,and local levels in the World Summit held in $2002$?

Define/Explain: Endemic species.

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.

Statement $A$: As moving from equator to polar region,species diversity decreases.
Statement $R$: Amazon rain forest of South America has less biodiversity.

Humans benefit from the diversity of life. Give two examples.