In the given scenario, there are three trophic levels. The correct option is A.
An organism's trophic level is the stance it possesses in a food web. A food chain is a series of organisms that eat other organisms and may be eaten in turn.
An organism's trophic level is the number of steps it has taken since the beginning of the chain.
In the given scenario there are three trophic levels namely producers, primary consumers, and secondary consumers.
Thus, the correct option is A.
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