Energy enters the ecosystem.

The process described in the practical is the flow of energy through a terrestrial ecosystem, which is visualized through food chains and food webs. Step 1: Energy enters the ecosystem. Energy primarily enters the ecosystem through producers (autotrophs), such as grasses, shrubs, or trees, which convert sunlight into chemical energy via photosynthesis. Step 2: Energy is transferred to consumers. This energy is then transferred to primary consumers (herbivores), like grasshoppers, beetles, or caterpillars, when they feed on the producers. Step 3: Energy moves up the trophic levels. Secondary consumers (carnivores or omnivores), such as spiders, birds, or lizards, obtain energy by preying on primary consumers. Tertiary consumers, like hawks or snakes, then feed on secondary consumers. Step 4: Formation of food chains and webs. A food chain illustrates a single pathway of this energy transfer (e.g., plant → grasshopper → bird). A food web shows the complex network of interconnected food chains, demonstrating multiple feeding relationships and the overall energy flow within the ecosystem. That's 2 down. 3 left today — send the next one.