Which of the following are important biotic factors that can affect the structure and organization of biological communities?
a) precipitation, wind
b) nutrient availability, soil ph
c) predation, competition
d) temperature, water
e) light intensity, seasonality

The following are important biotic factors that can affect the structure and organization of biological communities.

B) Nutrient availability, soil pH
C) Predation, competition

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Drought resistance because they are close to a lot of supplys 

Answerbeaches;