4. Would be A
5. Would be D
I hope this helped you :)
Answer:
Wetlands.
Explanation:
An area of land that is covered with a shallow layer of water during some or all of the year.
Nitrogen (78%), Oxygen (21%), Argon (0.9%), and the remaining 0.1% consists of traces of neon, krypton xenon, carbon dioxide, nitrogen oxides, and traces of others. so Nitrogen is the greatest. I hope this helps :)
