17. Where does the energy begin in the food chain? 18. Corbin and Angie found a shark washed up on the beach. Which of the following might be found in the shark's stomach? 19. Which Organism would best continue this food chain? 20. Which food chain is NOT correct? a. Algae small fish crab shark b. Plankton mussel crab shark c. Mussel crab shark algae d. Algae crab fish shark.