AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) Grass → Goat → Human
In a food chain, energy flows from producer to consumer. Grass (producer) is eaten by goat (primary consumer), which is eaten by human (secondary consumer).
A food chain always begins with a producer (green plant/grass) and energy flows in one direction toward higher trophic levels. The source passage (Chapter 13, Exercise Q2) directly lists "Grass, goat and human" as a correct food chain. Options A and C reverse the order; option D skips the goat as intermediate consumer.
Source: Chapter 13 (Our Environment), Exercises Q2 & Section 13.1.1