Food Webs and Food Chains Worksheet 1 Look at this food chain. lettuce greenfly ladybug thrush cat a What does the arrow mean in a food chain? b Name the producer in the food chain c Name the third trophic level in the food chain. d Name the tertiary consumer in the food chain. e What is the ultimate source of energy that drives the food chain? 2. Look at these food chains. grass slug thrush cat SER fox cat grass slug fox grass rabbit fox grass rabbit cat a Use the food chains to help you fill in the arrows on this food web. One has been added for you. Use the food web to help you answer these questions. b Name the producer in this food web.. c Name a consumer in this food web. d What eats rabbits? e What does a fox eat? slug thrush grass rabbit