Melissa has been depressed for the last month. Suddenly she has become euphoric and hyperactive, and she runs around the apartment complex claiming that she alone could solve the world's energy problems. Melissa is suffering from

Which of these is an example of physical systems impacting the environment? a flood causes erosion and loss of shoreline. people fill a lake before building houses near it. an earthquake causes a building to fall. a native tribe considers a volcano to be sacred.