Step 1: Understanding the food chain.
A food chain shows how energy flows through living organisms — starting from producers, then consumers, and finally decomposers.
Step 2: Role of producers.
Producers are organisms that prepare their own food using sunlight through the process of photosynthesis. They convert solar energy into chemical energy, which is then passed through the food chain.
Step 3: Examples.
- Green plants and blue-green algae (cyanobacteria) contain chlorophyll and use sunlight to synthesize food.
- Animals like rats, cats, and rabbits depend on these producers for their food.
Step 4: Conclusion.
Hence, the producers in a food chain are green plants and blue-green algae.