Answer:
Nitrates
Explanation:
A. Acid-- acid is right, but not the best answer.
B. Nitrates are fertilizers, which are things that would be used in all of these situations
C. Fuel-- no one is pouring gasoline on their grass to make it grow.
D. Sewage-- same as gas, but this time it is sewage.
Activity like having brightness all the way on or depending on how much data is used, having Bluetooth on also decreases the battery, having a charger on even when over 100 percent can make charging electronic slower. It's better to have the brightness low.
I believe the answer is B