According to Darwinian theory, the organisms best adapted to an environment are the ones to survive and reproduce.
(the organisms; best adapted; to an environment) (the organisms best adapted to an environment; are; the ones to survive and reproduce) (the ones; to survive; ) (the ones; to reproduce; )
the organisms the organisms best adapted to an environment the ones the ones
best adapted are to survive to reproduce
to an environment
the ones to survive and reproduce