dolphins if they went extinct it would be caused by
*pollution (heavy metals, sewage, PCB, rain water drains, plastic, co2 emissions)
*overfish (80% of all fishery's are over fished and kill many dolphins by net so there's lack of prey and population decrease)
*habitat loss (marine farming, tidal power and areas with a lot of boating activity)
all these factors are the worst threats a dolphin has if we do not stop doing this they will go extinct. this could cause a collapse in the food chain but i do not believe from fish population increase as populations of fish are only getting smaller and smaller.
Dolphins would go extinct.
nothing
They become extinct.
Gorillas are not extinct yet, but it could happen soon if they are not protected properly.
All animals that we know today will eventually become extinct, but there is no way to know if it will happen within your lifetime.
Eventually they will become extinct.
They risk dying out, or they move to another environment
nothing. nothing at all
They become extinct.
If they are not protected, they will become extinct.
It will become extinct
I would probably try not to become extinct also. I would be very interested in trying to determine what would cause something like that to happen to an animal that is doing so well currently. Whatever happened would probably be a problem for humans also.