What does a shutter speed of one mean? the shutter will stay open for half a second. the shutter will stay open for one second. the shutter will stay open for half a minute. the shutter will stay open for one minute.

Which of the following is not a way in which trees benefit the environment? a. they remove a significant amount of carbon dioxide from the atmosphere. b. they remove a significant amount of oxygen from the atmosphere. c. their roots hold soil in place, reducing rates of erosion. d. they remove ozone and particulates from the atmosphere. select the best answer from the choices provided a b c d