The number of trophic levels in an ecosystem are limited. Comment.

Explanation

### Step-by-Step Solution

1. **Understanding Trophic Levels**: Trophic levels refer to the different stages in a food chain, where organisms are categorized based on their feeding relationships. The primary producers (like plants) occupy the first trophic level, followed by primary consumers (herbivores), secondary consumers (carnivores), and so on.

2. **Energy Transfer in Ecosystems**: In an ecosystem, energy transfer occurs from one trophic level to the next. However, not all energy is transferred effectively. According to the 10% law of energy transfer, only about 10% of the energy from one trophic level is passed on to the next level.

3. **Energy Loss**: The remaining 90% of energy is lost primarily through metabolic processes, heat, and waste. This significant loss of energy at each trophic level results in a decrease in the total energy available as one moves up the food chain.

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