During
a. carbon dioxide and water are combined to make glucose
b. oxygen and water are combined to make glucose
c. carbon dioxide is used to break down glucose into energy
d. oxygen is used to break down glucose into energy

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

answerca air mass;