I dont understand how to do this and grades are put in today and im failing badly

Which phrases describe oxygen's roles in earth’s atmosphere? check all that apply. allows fuels to burn forms clouds that produce rain is the gas that animals breathe is used by plants to produce food forms ozone that absorbs the sun's harmful rays

Why do u think kenny is afraid when he realizes that the reading he has chosen to do will be for byrons calss? what happens after the reading that surprises kenny?

The mechanization of agriculture has resulted in all of the following excepta increased productionb. an increased ability to feed growing global populationsc. decreased erosion as a result of advanced planting machinesd. increased employment in the farming industry