On behalf of endangered species and habitats,why are conservationists calling for immediate and often expensive action?

Read the following statements:
$I.$ Species diversity increases as we move away from the equator towards the poles.
$II.$ Stellar's sea cow and passenger pigeon got extinct due to overexploitation by man.
$III.$ Lantana and Eichhornia are invasive weed in India.
$IV.$ The historic convention on biological diversity was held in $1992.$
Choose the option containing correct statements.

Which of the following statements are correct about the Amazon rainforest?
$I$. They are called the lungs of the planet.
$II$. They harbour probably millions of species.
$III$. They are the largest tropical rainforest in South America and have the highest biodiversity on Earth.
$IV$. They are being cut and cleared for cultivating soybeans or for conversion to grasslands for raising beef cattle.
Choose the correct option.

Given below is the representation of the extent of global diversity of invertebrates. What groups do the four portions $(a, b, c, d)$ represent respectively?

Identify $X, Y$ and $Z$ from the given pie charts representing global biodiversity of invertebrates and vertebrates:

In India, tropical wet evergreen rain forests are not found in: