Question

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

Explanation:

Water vapor is a greenhouse gas. Greenhouse gases trap (retain) heat (energy) from the Sun in the Earth's atmosphere. This trapped heat makes the Earth's climate warmer. Reflecting sunlight would cool the Earth, which is not the main role of water vapor. Also, water vapor affects both upper and lower atmosphere temperatures as it is present throughout the atmosphere and is involved in heat - transfer processes like convection and radiation.

Answer:

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