3. Which one of the following is the correct sequence of a food chain? 

1. Diatoms-Crustaceans-Herrings

2. Crustaceans-Diatoms-Herrings

3. Diatoms-Herrings-Crustaceans

4. Crustaceans-Herrings-Diatoms

Correct Answer :

Diatoms-Crustaceans-Herrings