Ecology of Streams and Mountains

erosion - erosion occurs when natural elements such as wind or water move earth and rocks and wear the land away. Erosion is always occurring along riverbanks and on cliff-faces where they are exposed to water and wind.
predators - predators are animals or plants that catch other animals to eat them. For instance, a black bear will catch a salmon and eat it, and a venus fly-trap plant will catch an insect and eat it too.