Google it.
Food chains/webs.
Some limiting factors are natural disasters, disease, competition, predation, and human activities. Hope this helps. :]
Some omnivores are: Humans Bears Chickens Pigs Raccoons Badgers Hedgehogs Opossums Skunks Sloths Squirrels Chipmunks Mice Rats Chimpanzees Various birds Chickens Some fish Some lizards and turtles...
kamote burdock