Question

Which of the following constitute a food-chain?
A.Grass, Wheat and Mango
B.Grass, Goat and Human
C.Goat, Cow and Elephant
D.Grass, Fish and Goat

Answer 1

Hint: A food chain is described as the linear network of links in a food web which start from a producer organism and ends at the apex predator which is the predator at the top.

Complete answer:
A food chain depicts how organisms are related to each other based on what food they eat. In a food chain each level represents a trophic level. The food chain starts from the primary producer who is the foundation of the ecosystem. These organisms are those who make their own food by utilising the sunlight. This is followed by the primary consumer which feeds on the primary producer. This is then followed by the ape predator which is the top predator and which feeds or the primary consumer. Apex predators can be carnivores or decomposers while primary producers are generally herbivores in nature.
Let us analyze the options to find out the correct option.

Option A: Grass, Wheat and Mango sequence has all primary producers on which consumers feed on. It does not depict a food chain sequence. Therefore, this is the incorrect option.

Option B: Grass, Goat and Human is a sequence in which grass is the primary producer, goat is the primary consumer (herbivore) and Human is an apex consumer or predator (carnivore). Therefore, this is the correct option.

Option C: Goat, Cow and Elephant are all primary consumers and do not form a food chain sequence. Therefore, this is the incorrect option.

Option D: Grass, Fish and Goat is a sequence in which Grass is the primary producer, fish is a consumer (omnivore) and goat is the primary consumer. This is not the correct sequence of food chain. Therefore, this is the incorrect option.

Hence, the correct answer is option (B)

Note: Food chain is vital for the survival of species as when one element is eliminated from the food chain it can result in extinction of other species which depend on it for their survival.