Periwinkle eats seaweed, crab eats periwinkle, and eventually seal eats the crab. That's why seal is the last on this food chain. Seal is the last consumer.
In A Food Chain Containing Seaweed, Periwinkle, Crab, Seal, Why Is The Seal The Last On This Food Chain?
Because it is not a full food chain
List 5 things that contains seaweed
Because a seal can eat a crab
Because it is a food chain and it cannot be change it is a fact ... Get it =P LOL