Option 1: Grass - Insect - Elephant

In this food chain, the grass is the producer, as it produces its own food through photosynthesis. The insect is the primary consumer, as it consumes the grass. However, the elephant is a herbivore and only consumes plant matter, so it cannot be considered a non-vegetarian. Therefore, option 1 is incorrect.

Option 3: Fish - Insect - Whale

In this food chain, the fish is the producer, as it is capable of producing its own food. The insect is a primary consumer, as it consumes the fish. However, the whale is a carnivore and only consumes other animals, so it cannot be considered a non-vegetarian. Therefore, option 3 is incorrect.

Option 4: Tiger - Rabbit - Owl

In this food chain, the tiger is the non-vegetarian, as it is a carnivore and only consumes other animals. The rabbit is a herbivore and consumes plants, making it a vegetarian. The owl is a carnivore and consumes other animals like the rabbit, making it a non-vegetarian as well. Therefore, option 4 is incorrect.

Option 2: Plant - Rabbit - Tiger

In this food chain,