They produce oxygen they are used as shelter, they are used for blocking the shade, they sustain other animals that sustain the planet and us.
I disagree it should be A
-3x + 3(2x - 6) = 6
-3x +6x - 18 = 6
3x - 18 = 6
3x = 6 + 18
3x = 24
x = 8
hope this helped, blessing! :)
Answer:
1. Sewage
2. diarrhea
3. atmosphere
4. 100 gallons of water
5. agricultural pollution
6. water cycle
7. water
Explanation: