Question

how does water vapor in the atmosphere influence the earth’s temperature? it only affects the temperature in the upper atmosphere. it retains the sun’s energy, making the climate warmer. it only affects the temperature in the lower atmosphere. it cools the atmosphere by reflecting sunlight.

Explanation:

Water vapor is a greenhouse gas. It absorbs and emits infrared radiation, trapping the Sun's heat in the Earth - atmosphere system, thus making the climate warmer. It doesn't just affect the upper or lower atmosphere and doesn't cool the atmosphere by reflecting sunlight as its main effect.

Answer:

It retains the Sun’s energy, making the climate warmer.