The Amazon rain forest is being cut and cleared for cultivating which plant?

Of the four major causes for the loss of biodiversity (Alien species invasion,habitat loss and fragmentation,over-exploitation,and co-extinctions),which according to you is the major cause for the loss of biodiversity? Give reasons in support.

Statement $(A)$: The Caspian tiger, a subspecies of tiger, is one of the recently extinct animals.
Reason $(R)$: The colonization of tropical Pacific islands by humans.

Discuss one example,based on your day-to-day observations,showing how the loss of one species may lead to the extinction of another.

$Nepenthes$ $khasiana$ is a/an:

Which of the following organisms are badly affected when large habitats are broken up into small fragments due to various human activities?