Answer:
Fish
Step-by-step explanation:
Biotic factors are the result of the interaction between living beings in a given region. Together, they form the biota, that is, the biological community that influences the ecosystem of which they are a part.
For example, in an aquatic environment, all animal and vegetable species make up the biotic factors of that environment, such as crabs, fish, otters, algae, among others.
The influence that biotic factors exert on the ecosystem are based mainly on ecological relationships and food chains.
Based on this, we can say that among the options given in the question above, the option "fish" is an example of a biotic factor.