Which is not a reason for maximum diversity in the tropics?

$A$: Tropical regions are more diversity-rich in comparison to temperate areas.
$R$: Availability of more solar energy directly contributes to higher productivity and species richness in these areas.

Give three hypotheses for explaining why tropics show the greatest levels of species richness.

According to ecologists,what is the value of $Z$ in the species-area relationship equation $\log \, S = \log \, C + Z \, \log \, A$?

Match $M$ and $N$ with the species-area relationship shown in the graphic representation below and choose the correct option.

In the tropical forests of different continents,the slope of the $Z$ line for frugivorous birds and mammals is found to be $...........$.