1. Food web is the cycle of energy through a food chain, it consists of distinct food chains -a multilinear food chain. 2. Biogeochemical cycle The biogeochemical cycles move through mainly the biotic and abiotic components of the earth, more elaborately the spheres -biospheres, lithosphere, hydrosphere and atmosphere regions of the ecosystem. 3. The rock cycle. The cycle wherein rocks undergo a process. 4. Circulation. The transportation and dissemination of nutrients throughout a human body.
To cycle energy through a food chain to recycle matter through the biosphere to recycle rocks through the layers of Earth to cycle nutrients through the human body