5. which natural process removes carbon dioxide from the air?
a plant photosynthesis
b the water cycle
c nitrogen cycling
d animal respiration

A plant photosynthesis

Explanation: Water and carbon dioxide are byproducts. Notice that photosynthesis and respiration are essentially the opposite of one another. Photosynthesis removes CO2 from the atmosphere and replaces it with O2. Respiration takes O2 from the atmosphere and replaces it with CO2.

the index of refraction of the second medium is higher. i just took the test trust me !