In the food chain given, the following are the trophic levels:
- Tree: producer
- Insect: primary consumer
- Frog: secondary consumer
- Snake: tertiary consumer
FOOD CHAIN:
Food chain is a linear sequence that shows the feeding relationships between organisms in an ecosystem.
A food chain comprises of organisms that occupy specific positions called trophic levels. The trophic levels in a typical food chain are as follows:
- Producers: These are organisms that produce food on their own e.g. tree
- Primary consumer: Organisms that feed directly on producers e.g insect
- Secondary consumer: They feed on primary consumers e.g frog
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