The animals that feed on plants are called :

• Producers 
• Carnivores
• Insectivores
• Herbivores

What trophic level is occupied by the birds in an ecosystem ?

• First
• Second
• Third
• Fourth

Cockroaches can feed both on plant and animal food, they are called :

• Herbivores
• Carnivores
• Omnivores
• None of the above

The green plants in the ecosystem-terminology are called :

• Producers
• Consumers
• Herbivores
• Carnivores