Explain why increased ecosystem diversity contributes to increase biodiversity in the biosphere

With greater biodiversity, there is less of an impact on the ecosystem if a specific (keystone) species dies off.

A diverse set of ecosystems means that there will be a wide variety of selection pressures exerted on the organisms.

Thus, natural selection will act to bring out the best suited traits for that particular ecosystem.

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

i think the answer would be d