Answer:
A. Caterpillar is a primary consumer
Step-by-step explanation:
Caterpillar is a primary consumer because they feed on a primary producer, in this case grass. The consumers eat producers, primary consumers eat primary producers, on land they are plant eaters, they are herbivores, in this ecosystem for example caterpillar, rabbits, squirrel and mouse.
Weasel and Fox are secondary consumer, they eat primary consumers.