Respuesta :
Answer:
decomposing animal matter
Explanation:
i just took the test on apex :)
The substance acts as a buffer in natural water is Decomposing animal matter.
What is a buffer?
A buffer is an aqueous solution that can defy important shifts in pH levels upon the addition of small quantity of acid or alkali.
Thus, option "C" is correct, Decomposing animal matter.
To learn more about buffer click here:
https://brainly.com/question/19093015
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