Which of these is a biotic factor of an ecosystem?
a. the temperature of water in a stream
b. the amount of water vapor present in a rain forest
c. the bacteria that live in the intestine of a rabbit
d. the rocks that provide cover for a rattlesnake
c. the bacteria that live in the intestine of a rabbit. The word biotic means anything pertaining to life. In ecology, the biotic factors refer to activities that of living organisms that affect other living organisms in the habitat.