So what do u mean by that question u don't give enough information
Answer:
A biotic factor is a living organism that shapes its environment. In a freshwater ecosystem, examples might include aquatic plants, fish, amphibians, and algae. Biotic and abiotic factors work together to create a unique ecosystem.
Explanation:
Hope this helps : )
Im pretty sure that it is the letter ::::A ..
hope this helped xoxo
