Food Chains begins always with energy, that is the sun. The producer, that is the plant, transfer the energy to the consumer, that is the grasshoper. Then the energy is pass to the 2 consumer, that is the snake. then our 3 consumer is the hawk that eat the snake and then the hawh pop and then it decompose and grow a new plant.
Food webs begins with the producers that are trees, grass, ect. organisims that cannot make their oun foods are consumer that eat producers.
They can eat also other consumers that is cal the pray. The predator eats the prey then the predator pop and make dicomposers.