1.) Scientists discovered a fungus attacking a species of frog in the South American
rainforests.
The population they studied nearly died out completely, but then they saw the numbers slowly
come back up. The best possible explanation for this is:
a.) Humans intervened and saved some of the frogs.
b.) The survivors had a gene that made them resistant to the parasite fungus and they passed
that gene on to their offspring.
c.) Female frogs were able to protect their eggs from the parasite.
d.) The frogs moved to a new environment to escape the fungus