The extinction of a species occurs when the environment changes and the adaptive characteristics of the species are no longer sufficient to allow their survival.
(The extinction of a species; occurs; ) (the environment; changes; ) (the adaptive characteristics of the species; are; T:no longer; sufficient to allow their survival) (the adaptive characteristics of the species; to allow; their survival)
The extinction of a species the environment the adaptive characteristics of the species the adaptive characteristics of the species
occurs changes are to allow
T:no longer sufficient to allow their survival
their survival