alive
that is correct they are gone for good Strictly speaking, the term extinction is not applied to individual organisms, it is applied to a species. If there are no longer any living members of a specific species, then that species is said to be extinct. When an organism is no longer alive it is said to be dead.
Extinct (Extinction)
They become extinct.
We have a highly technical, scientific term for this. We refer to such organisms as "dead."
the world will be lost of organisms.
No, it is an adjective (no longer living). The active and passive verbs would be to make extinct or to become extinct.
DINOSAURS.
what happen when some living organisms in food phyramid become extinct
because a food source can become extinct and if the other organisms only food source becomes extinct the species would starve and become extinct and other species will become extinct as well.
the species will no longer be seen
alive
Extinction. When a species fails to adapt, it dies out.