Discussion
Which of the following occupies Trophic Level I in food chain ?
Answer: D
Plants (green plants, the producers) occupy the first trophic level in a food chain. They make food from sunlight by photosynthesis, and all other levels depend on them for energy.
Primary consumers (herbivores) occupy the second level and carnivores the third or higher levels. Bacteria are decomposers, which act on dead matter at every level and do not form the first level. So only plants fit.
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