We have a highly technical, scientific term for this. We refer to such organisms as "dead."
Extinct (Extinction)
alive
They become extinct.
the world will be lost of organisms.
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.
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.
extinct species
WWF doesn't do anything to protect extinct organisms. When a species has become extinct it's lost, gone forever. Not much point in trying to protect something that isn't there any more.
Few organisms have become extinct. Few organisms are rare species.
What do you think might happen to acommunity if grizzy bears suddenly become extinct
They risk dying out, or they move to another environment