How many species of birds are found in the Amazon rainforest of South America?

How many biodiversity hotspots are there in the world?

India covers the world land area of . . . . . . and contributes the global diversity of . . . . . . .

What is the true approximate percentage of the earth's land area covered by biodiversity hot spots?

Tropical regions show the greatest level of species richness because:
$A$. Tropical latitudes have remained relatively undisturbed for millions of years,hence more time was available for species diversification.
$B$. Tropical environments are more seasonal.
$C$. More solar energy is available in the tropics.
$D$. Constant environments promote niche specialization.
$E$. Tropical environments are constant and predictable.
Choose the correct answer from the options given below.

In India,temperate evergreen vegetation occurs mostly in