The first criteria for being able to continue this reproductive process was to be able to adapt to the natural environment.
(The first criteria for being able to continue this reproductive process; was; to be able to adapt to the natural environment) (The first criteria for being able to continue this reproductive process; to be; able to adapt to the natural environment)
The first criteria for being able to continue this reproductive process The first criteria for being able to continue this reproductive process
was to be
to be able to adapt to the natural environment
able to adapt to the natural environment