: Basic concepts of environment and ecology, including food chains, energy flow, and ecological pyramids. Biological Systems
Breaks down the hierarchy of nature, energy flows (food chains/webs), and nutrient cycling.
: He defines ecosystems as dynamic communities where biotic (living) and abiotic (non-living) factors interact. He stresses that high biodiversity is essential for ecosystem stability and resilience. Sustainable Development
Here are some key points from the essay: