Which animal has become extinct in India?

The species,which is going to become extinct due to lack of proper care,would be called:

In the current era,$\underline{X \%}$ of all bird species and $\underline{Y \%}$ of all amphibian species in the world are facing the threat of extinction.

What is co-extinction? Explain with a suitable example.

What is the primary reason for the continuous decline in the population of wildlife?

How is the presently occurring species extinction different from the earlier mass extinctions?