Answer:
The correct answer is option c: rivers
Explanation:
Hello!
let's solve this!
In an ecosystem, the biotic factors are those that have life, that is, living beings.
Instead, abiotic factors are those that have no life.
Let's analyze each of the options:
to. herbivore population: they are living beings so they are biotic factors
b. plants: they are living beings, then biotic factors
c. rivers: they are not living beings, they are abiotic factors
d. soil bacteria: they are living beings so they are biotic factors.
We conclude that the correct answer is option c: rivers
