Question

cycling of matter and energy quick check
which of the following is the first trophic level in every ecosystem? (1 point)
heterotroph
primary consumer
autotroph
tertiary consumer

Explanation:

The first trophic level in ecosystems consists of organisms that produce their own food, forming the base of the food chain. Autotrophs (like plants, algae) perform photosynthesis or chemosynthesis to create organic matter, while heterotrophs and all consumers rely on other organisms for energy, occupying higher trophic levels.

Answer:

autotroph