Which statement about images is correct? a) a virtual image cannot be formed on a screen. b) a virtual image cannot be viewed by the unaided eye. c) a virtual image cannot be photographed. d) a real image must be erect. e) mirrors always produce real images because they reflect light.

Which sentences describe point source pollution? in this type of pollution, the source of the pollution is single and easily identifiable. when runoff water from the melting of snow mixes with debris, it creates pollution. the runoff water, mixed with pollutants, reaches large areas with disastrous effects. alternatively, when a wastewater treatment plant releases harmful chemicals into a stream, the chemicals pollute the stream water because they are not treated for safety.