Grass, Wheat and Mango
Grass, Goat and Human
Goat, Cow and Elephant
Grass, Fish and Goat
Correct option is B. Grass, Goat and Human. Food chain is a series of organisms where each is dependent on the next as a source of food. Grass forms the primary producers of the food chain, goat eats grass (herbivore) and humans eats goat (carnivore). So, the correct answer is option B.