Number of red list categories prepared by $WCU$ $(IUCN)$ is

What is the proportion of Arthropods among animal species?

What is the difference between flora, fauna, and vegetation? Eichhornia crassipes is called an exotic species, while Rauwolfia serpentina is an endemic species in India. What do these terms 'exotic' and 'endemic' refer to?

Match the following with respect to different categories of the red list. Choose the correct option.

Column-$I$	Column-$II$
$i$. Extinct	$a$. Species whose members survive only in captivity.
$ii$. Extinct in wild	$b$. Rapid population decline of $50\%$ to more than $70\%$ over the previous $10$ years.
$iii$. Endangered	$c$. Species in which the last individual has died.
$iv$. Vulnerable	$d$. Rapid population decline of $30\%$ to more than $50\%$ over the previous $10$ years.

Based on the provided pie chart representing the diversity of invertebrates,which taxa represent the maximum and minimum proportions,respectively?

Choose the correct matching for the Amazon rainforest biodiversity data: $a$-mammals,$b$-$1300$ species,$c$-$3000$ species,$d$-$427$ species,$e$-birds,$f$-fishes.