A snake charmer came to the society and smelled the presence of a cobra near the guardroom. The head of the society agreed to allow the man to search, catch and take away the snake with him. Little Krishi who was seeing all this, disagreed. She explained the people that it might disturb the food chain in the environment. Now, answer the following questions.
(i) Describe food chain.
(ii) Construct a food chain involving snake at one of its level.