How do chlorofluorocarbons (cfcs) contribute to ozone depletion?

a.
chlorine atom (cl) breaks apart the ozone molecule

b. cfcs build up and block the filtering effects of the ozone layer

c.
chlorine atom (cl) bonds to the ozone molecule and changes its chemical properties

d. breaks off an oxygen atom (o) and attaches it to a hydroxide ion (oh) to form water

The correct answer is option (a). chlorine atom (Cl) breaks apart the ozone molecule .

In the presence of the Ultraviolet radiations, the CFC (chlorofluorocarbons) molecules break down, the breaking of CFC (breaking of chlorine and carbon bond) result in formation of free chlorine. The free chlorine atom reacts with ozone and result in the formation of oxygen molecule. As a result, the ozone layer is depleted.

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.