Question

20 POINTS!!!!!!!!!!!!
ANSWER!!!!!!!!!!!!!!

Answer 1

8

Step-by-step explanation:

The duckweed plant grew the most with a pH of 8

Edit: I just realized that someone else basically said the same thing

Answer 2

optimum = best
so the answer would be “8” because the duckweed plants grew the most with the PH balance of 8.