Explain why there are a large number of marsupial mammal species in australia and south america, two continents that were once connected
. a) ozone production
b) continental drift
c) the fifth mass extinction
d) the first mass extinction

option: B is the correct answer.

( Continental drift)

Step-by-step explanation:

" Continental drift describes one of the earliest ways geologists thought continents moved over time. Today, the theory of continental drift has been replaced by the science of plate tectonics "

Hence, Continental Drift helps explain why there are a large number of marsupial mammal species in Australia and South America, two continents that were once connected.