Final answer:
Grass and Frog are at lower trophic levels, while Mouse and Lion are at higher trophic levels in a food chain.
Explanation:
Grass and Frog are likely to be found at the lowest trophic levels in a food chain. They are primary producers and primary consumers, respectively. Mouse and Lion are likely to be found at higher trophic levels as they consume organisms lower in the food chain.
Learn more about trophic levels in a food chain here:
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