In the wild, there would be vacuum left by their extinction. The plants that they normally eat would probably be far more plentiful. Ant and termite numbers would probably increase. The number of monkeys and small deer would increase (since that is their main meat source). African people who hunt them for bush meat would starve or have to find alternative sources of food. But the most important thing to consider is that humans would be loosing family. We share more DNA and anatomical and cognitive similarities with chimps and Bonobos than any other life form on earth. If they went extinct, it would be like someone went through and killed all of your cousins. This would be a bad thing since chimps are capable of intelligent thought and experience the same emotions as humans. For more, see the book The Great Ape Project (1993) edited by Paola Cavalieri and Peter Singer. See also Next of Kin(1997) by Roger Fouts.
nothing
FHRITP
You mom will disappear
Then ducks will rule the world.
chimpanzees
It would be extinct. As in no longer in existence. It would not be here anymore.
They aren't extinct, however they could become extinct in the wild because their habitat is being destroyed by logging companies, their meat has became more popular, and their babies are being sold as pets or as tourist attractions.
nothing
There will be no more elephants. Boo
bullfighters would be out of a job
then you would not even be here
Then there would be no human nature.