A) nitrogen fixationing organisms
B) photosynthesizing organisms
C) respiration
D) decomposers
Correct Answer: B
Solution :
The series of organisms eating one being eaten by the other is called the food chain, eg, Grass \[\to \] Herbivore \[\to \] Carnivore Therefore, from the above example it is clear that grasses are the primary producers and hence, the food chain starts with photosynthesizing organisms (grasses).
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