I am going to assume you meant the "first trophic level" of the ecosystem. The first tropic level of an ecosystem is made up of producers, so the answer is C, Acorns.
Acorns
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Answer:
B
Explanation:
Answer: equilibrium phenomenon
Answer: Contential Crust
the element oxygen , represented by the symbol o, is classified as a pure substance
Two examples of organisms who do not reproduce sexually are:
1. Yeast
2. Hydra
