*Extinction of a species occurs when the environment changes and the adaptive characteristics of a species are insufficient to allow its survival.
(*Extinction of a species; occurs; ) (the environment; changes; ) (the adaptive characteristics of a species; are; insufficient to allow its survival) (the adaptive characteristics of a species; to allow; its survival)
*Extinction of a species the environment the adaptive characteristics of a species the adaptive characteristics of a species
occurs changes are to allow
insufficient to allow its survival
its survival