It would be B.Carbon dixide.
We give out carbon dioxide which gos to the plant, so they can give out oxygen for us to breathe.
And that cycle repeats itself forever and forever..
~Hope this helped :)
Hey You!
I Believe It Is Called: Oropharynx.
Answer:
Subduction is the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.