Complex sentence: As the food chain contains and there are also carnivores who feed on the herbivores and then other carnivores which eat those carnivores the energy is passed on from trophic level to trophic level and each time some of the energy is lost.
Split into simpler sentences: As the food chain progresses, there are carnivores who feed on the herbivores and then other carnivores which eat those carnivores. The energy is passed on from trophic level to trophic level and each time some of the energy is lost.