the average yearly rainfall in the ecosystem the types of producers found in the ecosystem the size of a predator population in the ecosystem the microorganisms living in the soil of the ecosystem
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these is an abiotic element in an ecosystem?
Possibilities:
- the average yearly rainfall in the ecosystem
- the types of producers found in the ecosystem
- the size of a predator population in the ecosystem
- the microorganisms living in the soil of the ecosystem

the average yearly rainfall in the ecosystem