In a food-chain, a trophic level represents a functional level, not a species. Explain.

Explanation

To explain why a trophic level in a food chain represents a functional level rather than a specific species, we can break down the concept into several key points:

### Step 1: Understanding Trophic Levels
A trophic level refers to the position an organism occupies in a food chain. It is categorized based on how the organism obtains energy. The primary levels include:
- **Producers (Trophic Level 1)**: These are typically plants or photosynthetic organisms that produce energy through photosynthesis.
- **Primary Consumers (Trophic Level 2)**: These are herbivores that consume producers.
- **Secondary Consumers (Trophic Level 3)**: These are carnivores that eat primary consumers.
- **Tertiary Consumers (Trophic Level 4)**: These are top predators that eat secondary consumers.
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