Question

Which of the following constitute a food chain?

• A. plant, apple, butterfly, man
• B. grass, spider, bee, buffalo
• C. plant, insect, toad, snake
• D. algae, insect larvae, fish, cow

Answer 1

The correct option is C

plant, insect, toad, snake

The correct option is (C)

EXPLANATION:

1. The food chain is a linear representation of organisms in a 'who eats whom" sequence.
2. It is a series of organisms taking part at various trophic levels from the producer to the consumer.
3. There are four levels in a food chain known as the Trophic level, where the transfer of food and energy takes place.
4. The four trophic levels are-

1. First Trophic Level- Primary Producers- They are the ones who prepare their own food. Example- green plants.
2. Second Trophic Level- Primary Consumers- They are the herbivores who directly feed on the primary producers. Example- insects.
3. Third Trophic Level- Secondary Consumers- They are carnivore animals. Example- birds or small animals like frogs.
4. Fourth Trophic Level-Tertiary Consumers- They are carnivorous but they thrive on the secondary consumers. Example- man, snake, and other animals.

Final answer: Plant, insects, toads, and snakes constitute a food chain.