‘Introduction of Clarias gariepinus into Indian rivers posed a threat to indigenous cat fishes’.

Which one of the following causes of biodiversity loss supports the statement given above?

When alien species are introduced unintentionally or deliberately for whatever purpose, some of them turn invasive, and cause decline or extinction of indigenous species.

Illegal introduction of the African catfish Clarias gariepinus for aquaculture purposes is posing a threat to the indigenous catfishes in India.