Which of the following endangered animals is the source of the world's finest,lightest,warmest,and most expensive wool,known as Shahtoosh?

The colonisation of tropical........ by humans is said to have led to the extinction of more than $2000$ species of native birds.

The recent illegal introduction of the African catfish $Clarias$ $gariepinus$ for aquaculture purposes is posing a threat to the indigenous catfishes in our rivers.

Biodiversity loss occurs due to the reasons given below:
$(i)$ Habitat loss and fragmentation
$(ii)$ Co-extinction
$(iii)$ Over-exploitation
$(iv)$ Alien species invasion
Identify the correct reasons.

One of the chief reasons among the following for the depletion in the number of species making it endangered is

"The Evil Quartet" of biodiversity loss includes which of the following?