$A$ species which is in danger of extinction is known as:

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

If the forest area is reduced to half,which one of the following will be a long-term effect?

The fast dwindling $....A...$ forest is estimated to produce $....B...$ percent of the total oxygen in Earth's atmosphere.

The decline in the population of Indian native fishes due to the introduction of $Clarias$ $gariepinus$ in the river Yamuna can be categorized as:

Exotic species are also called
$I.$ introduced species
$II.$ alien species
$III.$ non-indigenous species
$IV.$ non-native species
Choose the correct combination