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Which is the simplest correct food chain in a grassland ecosystem?
AInsect → Grass → Snake
BGrass → Insect → Frog → Snake → Hawk
CFrog → Snake → Insect → Grass
DHawk → Snake → Frog → Insect → Grass
Answer & Solution
Correct answer: B. Grass → Insect → Frog → Snake → Hawk
1. A food chain begins with the producer (grass).
2. Energy flows: producer → primary consumer (insect) → secondary (frog) → tertiary (snake) → quaternary (hawk).
3. Other orderings violate the direction of energy flow.
_Source: NCERT Class 10 Science, Ch 13 "Our Environment", §13.1.1_
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