Concept:In a food chain, a tertiary consumer eats secondary consumers. It is at the top trophic level after primary and secondary consumers.
Explanation:Grass is a producer, not a consumer.
Grasshopper is a primary consumer that eats plants.
Frog is a secondary consumer that eats insects like grasshoppers.
Snake eats frogs and other small animals, making it a tertiary consumer.
Therefore, among the options, the snake is the tertiary consumer.
Answer:B. Snake