Here's Joel's Explanation :D
Plant's get energy from the sun light, then herbivores and insect eat the plants. After that is the Predator vs Prey, Carnivores come and eat the herbivores transferring the energy to them. Then Bacteria decomposes the bodies of the animals and gives nutrition to the soil. Finally the nutrient in the soil is once again given back to the plants. :D
Refer to the picture I left below if you still need further help. :)
Hope I was able to help. :)
