Which below is not a process by which carbon dioxide enters the
atmosphere? *

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

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

i think it’s c but i might be wrong. if i am let me know! have a good rest of your day as well!