Final answer:
A biogeochemical cycle is a pathway through which elements or compounds are transferred between living organisms and the environment. Energy pyramids show the flow of energy through different trophic levels in an ecosystem.
Step-by-step explanation:
A biogeochemical cycle is a pathway through which elements or compounds are transferred between living organisms and the environment. It involves the cycling of nutrients such as carbon, nitrogen, and phosphorus, as well as the movement of energy through ecosystems. Energy pyramids show the flow of energy through different trophic levels in an ecosystem, with producers at the bottom and higher trophic levels above.
Learn more about Biogeochemical cycles