Answer:
1. A - animal release carbon dioxide into the air, and animals breathe it in.
2. A - ammonia would build up in the soil.
3. D - water cycle
4. B - over - fertilizing soil.
5. A - adding excessive carbon dioxide to the atmosphere through burning fossils fuels.
Step-by-step explanation:
I am in 9th grade connections academy. So, ik the answers plus, i just did it and I got a 60% but just giving you the answer.
QuickCheck - Biology - Unit 4 Lesson 5