A) autotrophs
B) herbivores
C) carnivores
D) decomposers
Correct Answer: A
Solution :
Food chain is a transfer of energy in the form of food from one trophic level to the next by eating and being eating. Food chains always (except in detritus food chain) starts with the producers which are green autotrophic plants (unicellular or multicellular). These plants in the presence of solar energy, prepare food for their own so they are autotrophic and called producer. The form primary trophic level and are eaten I herbivores (2nd trophic level). Herbivores then eaten by primary carnivores (3rd trophic level) and primary carnivores by secondary carnivores (5th trophic level).
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