Respuesta :

Producers, who make their own food using photosynthesis or chemosynthesis, make up the bottom of the trophic pyramid. Primary consumers, mostly herbivores, exist at the next level, and secondary and tertiary consumers, omnivores and carnivores, follow.

Answer:

Photoautotrophs and Chemoautotrophs.

Explanation:

The Photoautotrophs process uses sunlight or photosynthesis.

The Chemoautotrophs process uses chemicals.

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