Asked by Labbayk

Which of the following factors does not vary between a fast-following river and a pond that receives no water input?

a. oxygen levels
b. salt concentration***
c. temperature
d. fish species

Plzzz help me:)
Answered by Labbayk
NVM, i'm done!
Answered by Shawn Mendes is bae
what was the answer?
Answered by Carolyn
B, salt concentration
Answered by Mikle
The correct answer is B
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