Which plant entered India as a contaminant with imported wheat?

How many of the following are causes of biodiversity losses $:-$
$(a)$ Habitat loss
$(b)$ Over-exploitation
$(c)$ Alien species invasion
$(d)$ Co-extinction

Which species has become extinct due to overexploitation by humans?

$Eichhornia$ $crassipes$ is a

Which endangered animal is the source of the world's thinnest, lightest, warmest, and most expensive wool?

The term 'The Evil Quartet' is related to the major causes of: