Final answer:
The rat is a primary consumer, while the python and the wolf are secondary and tertiary consumers respectively.
Step-by-step explanation:
In this food chain, the rats would be the primary consumers as they feed on plants like corn. The next level would include the secondary consumers which are the python and the fox that feed on the rats. Lastly, the tertiary consumers would be the wolf and the eagle that feed on the python and the fox respectively. The other organisms mentioned in the options are either producers (like grasshopper and fruit fly that consume plants), or not part of this particular food chain.
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